forked from ara-software/AraSim
-
Notifications
You must be signed in to change notification settings - Fork 0
/
IceModel.cc
1917 lines (1560 loc) · 63.8 KB
/
IceModel.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include "TRandom3.h"
#include "Constants.h"
#include "Primaries.h"
#include "IceModel.h"
#include "EarthModel.h"
#include "Vector.h"
#include "Ray.h"
#include "Settings.h"
//#include "icemodel.hh"
//#include "earthmodel.hh"
//#include "vector.hh"
//#include "ray.hh"
#include "Tools.h"
#include <iostream>
#include <fstream>
#include <cstdlib>
ClassImp(IceModel);
using namespace std;
//class Interaction;
//Parameters of the BEDMAP ice model. (See http://www.antarctica.ac.uk/aedc/bedmap/download/)
int nCols_ice=1200; //number of columns in data, set by header file (should be 1200)
int nRows_ice=1000; //number of rows in data, set by header file (should be 1000)
int cellSize=5000; //in meters, set by header file (should be 5000) - same for both files
int xLowerLeft_ice=-3000000;
int yLowerLeft_ice=-2500000;
int nCols_ground=1068;
int nRows_ground=869;
int xLowerLeft_ground=-2661600;
int yLowerLeft_ground=-2149967;
int nCols_water=1200;
int nRows_water=1000;
int xLowerLeft_water=-3000000;
int yLowerLeft_water=-2500000;
int NODATA=-9999;
//Variables for conversion between BEDMAP polar stereographic coordinates and lat/lon. Conversion equations from ftp://164.214.2.65/pub/gig/tm8358.2/TM8358_2.pdf
const double scale_factor=0.97276901289; //scale factor at pole corresponding to 71 deg S latitude of true scale (used in BEDMAP)
const double ellipsoid_inv_f = 298.257223563; //of Earth
const double ellipsoid_b = EarthModel::R_EARTH*(1-(1/ellipsoid_inv_f));
const double eccentricity = sqrt((1/ellipsoid_inv_f)*(2-(1/ellipsoid_inv_f)));
const double bedmap_a_bar = pow(eccentricity,2)/2 + 5*pow(eccentricity,4)/24 + pow(eccentricity,6)/12 + 13*pow(eccentricity,8)/360;
const double bedmap_b_bar = 7*pow(eccentricity,4)/48 + 29*pow(eccentricity,6)/240 + 811*pow(eccentricity,8)/11520;
const double bedmap_c_bar = 7*pow(eccentricity,6)/120 + 81*pow(eccentricity,8)/1120;
const double bedmap_d_bar = 4279*pow(eccentricity,8)/161280;
const double bedmap_c_0 = (2*EarthModel::R_EARTH / sqrt(1-pow(eccentricity,2))) * pow(( (1-eccentricity) / (1+eccentricity) ),eccentricity/2);
double bedmap_R = scale_factor*bedmap_c_0 * pow(( (1 + eccentricity*sin(71*RADDEG)) / (1 - eccentricity*sin(71*RADDEG)) ),eccentricity/2) * tan((PI/4) - (71*RADDEG)/2); //varies with latitude, defined here for 71 deg S latitude
const double bedmap_nu = bedmap_R / cos(71*RADDEG);
/*
IceModel::IceModel() {
//default constructor
}
*/
IceModel::IceModel(int model,int earth_model,int moorebay) : EarthModel(earth_model),mooreBayFlag(moorebay) {
setUpIceModel(model);
}
IceModel::~IceModel () {
}
void IceModel::setUpIceModel(int model) {
DEPTH_DEPENDENT_N = (int) (model / 10);
model -= DEPTH_DEPENDENT_N * 10;
ice_model=model;
if (ice_model != 0 && ice_model != 1) {
cout<<"Error! Unknown ice model requested! Defaulting to Crust 2.0.\n";
ice_model = 0;
} //if
else if (ice_model==1) {
ReadIceThickness();
ReadWaterDepth();
ReadGroundBed();
} //else if (BEDMAP)
//read in attenuation length data for direct signals
int i=0;
ifstream sheetup("data/icesheet_attenlength_up.txt");
if(sheetup.fail())
{
cerr << "Failed to open icesheet_attenlength_up.txt" << endl;
exit(1);
}
i=0;
while(sheetup>>d_sheetup[i]>>l_sheetup[i])
{
i++;
}
sheetup.close();
ifstream shelfup("data/iceshelf_attenlength_up.txt");
if(shelfup.fail())
{
cerr << "Failed to open iceshelf_attenlength_up.txt" << endl;
exit(1);
}
i=0;
while(shelfup>>d_shelfup[i]>>l_shelfup[i])
{
i++;
}
shelfup.close();
ifstream westlandup("data/westland_attenlength_up.txt");
if(westlandup.fail())
{cerr << "Failed to open westland_attenlength_up.txt";
exit(1);
}
i=0;
while(westlandup>>d_westlandup[i]>>l_westlandup[i])
{
i++;
}
westlandup.close();
//read in attenuation length for downgoing signals
ifstream sheetdown("data/icesheet_attenlength_down.txt");
if(sheetdown.fail())
{
cerr << "Failed to open icesheet_attenlength_down.txt" << endl;
exit(1);
}
i=0;
while(sheetdown>>d_sheetdown[i]>>l_sheetdown[i])
{
i++;
}
sheetdown.close();
ifstream shelfdown("data/iceshelf_attenlength_down.txt");
if(shelfdown.fail())
{
cerr << "Failed to open iceshelf_attenlength_down.txt" << endl;
exit(1);
}
i=0;
while(shelfdown>>d_shelfdown[i]>>l_shelfdown[i])
{
i++;
}
shelfdown.close();
ifstream westlanddown("data/westland_attenlength_down.txt");
if(westlanddown.fail())
{cerr << "Failed to open westland_attenlength_down.txt";
exit(1);
}
i=0;
while(westlanddown>>d_westlanddown[i]>>l_westlanddown[i])
{
i++;
}
westlanddown.close();
// new ARA ice attenuation measurement values (at 300 MHz)
//
/*
ifstream file( "data/ARA_IceAttenL.txt" );
string line;
string line2;
int N=-1;
int skipline = 1;
int first_time = 1;
if ( file.is_open() ) {
while (file.good() ) {
if ( first_time == 1 ) {
for (int sl=0; sl<skipline; sl++) {
getline (file, line);
}
first_time = 0;
}
getline (file, line);
N++;
//ARA_IceAtten_Depth[N] = atof( line.substr(0, line.find_first_of(",")).c_str() );
cout<< line.substr(0, line.find_first_of(",")).c_str()<<endl;
cout<<"ARA_IceAtten Depth"<<N<<" : "<<ARA_IceAtten_Depth[N]<<"\t";
line2 = line.substr( line.find_first_of(",")+1);
ARA_IceAtten_Length[N] = atof( line2.substr(0).c_str() );
cout<<"ARA_IceAtten L"<<N<<" : "<<ARA_IceAtten_Length[N]<<"\n";
}
file.close();
}
ARA_IceAtten_bin = N;
cout<<"ARA_IceAtten total N : "<<ARA_IceAtten_bin<<"\n";
// done reading ARA ice attenuation info
*/
//
//The following hardcoded numbers correspond to a model derived by Eugene Hong, based on ice attenuation measurements (c.f. TestBed paper). This is the default mode usedf by AraSim.
//More details can be found on Eugene's Thesis: http://radiorm.physics.ohio-state.edu/elog/Write-Ups/170504_105713/Thesis_-_Eugene_Hong.pdf, p. 54 and 132.
double ARA_IceAtten_Depth_tmp[53] = { 72.7412, 76.5697, 80.3982, 91.8836, 95.7121, 107.198, 118.683, 133.997, 153.139, 179.939, 206.738, 245.023, 298.622, 356.049, 405.819, 470.904, 516.845, 566.616, 616.386, 669.985, 727.412, 784.839, 838.438, 899.694, 949.464, 1003.06, 1060.49, 1121.75, 1179.17, 1236.6, 1297.86, 1347.63, 1405.05, 1466.31, 1516.08, 1565.85, 1611.79, 1657.73, 1699.85, 1745.79, 1791.73, 1833.84, 1883.61, 1929.56, 1990.81, 2052.07, 2109.49, 2170.75, 2232.01, 2304.75, 2362.17, 2431.09, 2496.17 };
double ARA_IceAtten_Length_tmp[53] = { 1994.67, 1952, 1896, 1842.67, 1797.33, 1733.33, 1680, 1632, 1586.67, 1552, 1522.67, 1501.33, 1474.67, 1458.67, 1437.33, 1416, 1392, 1365.33, 1344, 1312, 1274.67, 1242.67, 1205.33, 1168, 1128, 1090.67, 1048, 1008, 965.333, 920, 874.667, 834.667, 797.333, 752, 714.667, 677.333, 648, 616, 589.333, 557.333, 530.667, 506.667, 477.333, 453.333, 418.667, 389.333, 362.667, 333.333, 309.333, 285.333, 264, 242.667, 221.333 };
ARA_IceAtten_bin = 53;
for (int bin=0; bin<ARA_IceAtten_bin; bin++) {
ARA_IceAtten_Depth[bin] = ARA_IceAtten_Depth_tmp[bin];
ARA_IceAtten_Length[bin] = ARA_IceAtten_Length_tmp[bin];
}
}
// read depth in positive value and return attenuation length (m) at the depth
double IceModel::GetARAIceAttenuLength(double depth) {
double AttenL;
// check if depth is positive value
if ( depth < 0. ) {// whether above the ice or wrong value!
cerr<<"depth negative! "<<depth<<endl;
}
else {
AttenL = Tools::SimpleLinearInterpolation_extend_Single(ARA_IceAtten_bin, ARA_IceAtten_Depth, ARA_IceAtten_Length, depth );
}
return AttenL;
}
//! Get the ice temperature as a function of depth
/*!
Function returns the ice temperaturea as a function of depth (a positive number)
This equation is a result of the fit from the Berkeley group
which used IceCube data to probe the temperature as a function of depth
And is described here: https://icecube.wisc.edu/~araproject/radio/#figure1a
and https://icecube.wisc.edu/~araproject/radio/temp/
\param z depth as a positive number in meters
\return ice temperature in Celsius
*/
double IceModel::temperature(double z){
if( z < 0.){
cerr<<"depth negative! "<<z<<endl;
}
double temp = (-51.0696) + (0.00267687 * z) + (-1.59061E-08 * pow(z,2.)) + (1.83415E-09 * pow(z,3.));
return temp;
}
//! Get the ice attenuation length at a depth and frequency
/*!
Function returns the ice attenuation length at a given depth (in m)
and frequency (in GHz). This uses a fit from Besson et al.
described here: https://icecube.wisc.edu/~araproject/radio/atten/
\param depth depth as a positive number in meters
\param freq frequency as a number in GHz
\return ice temperature in Celsius
*/
double IceModel::GetFreqDepIceAttenuLength(double depth, double freq) {
double AttenL = 0.0;
if ( depth < 0. ) {
cerr<<"depth negative! "<<depth<<endl;
}
else {
double t = temperature(depth);
const double f0=0.0001, f2=3.16;
const double w0=log(f0), w1=0.0, w2=log(f2), w=log(freq);
const double b0=-6.74890+t*(0.026709-t*0.000884);
const double b1=-6.22121-t*(0.070927+t*0.001773);
const double b2=-4.09468-t*(0.002213+t*0.000332);
double a,bb;
if(freq<1.){
a=(b1*w0-b0*w1)/(w0-w1);
bb=(b1-b0)/(w1-w0);
}
else{
a=(b2*w1-b1*w2)/(w1-w2);
bb=(b2-b1)/(w2-w1);
}
AttenL = 1./exp(a+bb*w);
}
return AttenL;
}
int IceModel::Getice_model() {
return ice_model;
}
//constructor IceModel(int model)
Position IceModel::PickBalloonPosition() const {
Vector temp;
return temp;
}
//--------------------------------------------------
// int IceModel::PickUnbiased(int inu, Interaction *interaction1, IceModel *antarctica) {
//
//
// interaction1->PickAnyDirection(); // first pick the neutrino direction
//
// double mincos=cos(COASTLINE*RADDEG);
// double maxcos=cos(0.);
// double minphi=0.;
// double maxphi=2.*PI;
// double thisphi,thiscos,thissin;
// double theta=0.;
// double phi=0.;
//
// int ilon,ilat;
// int e_coord,n_coord;
// double vol_thisbin=0.;
// double lon=0.;
// double lat=0.;
//
//
// thisphi=gRandom->Rndm()*(maxphi-minphi)+minphi;
// thiscos=gRandom->Rndm()*(maxcos-mincos)+mincos;
// thissin=sqrt(1.-thiscos*thiscos);
// Position thisr_in;// entrance point
// Position thisr_enterice;
// Position thisr_enterice_tmp;
// Position thisnuexitearth;
// Position thisnuexitice;
// Position thisr_exitice;
// interaction1->noway=0;
// interaction1->wheredoesitleave_err=0;
// interaction1->neverseesice=0;
// interaction1->wheredoesitenterice_err=0;
// interaction1->toohigh=0;
// interaction1->toolow=0;
//
// thisr_in.SetXYZ(R_EARTH*thissin*cos(thisphi),R_EARTH*thissin*sin(thisphi),R_EARTH*thiscos);
// if (thisr_in.Dot(interaction1->nnu)>0)
// interaction1->nnu=-1.*interaction1->nnu;
// // does this intersect any ice
// //cout << "lat, coastline, cos are " << thisr_in.Lat() << " " << COASTLINE << " " << cos(interaction1->nnu.Theta()) << "\n";
// if (thisr_in.Lat()>COASTLINE && cos(interaction1->nnu.Theta())<0) {
// interaction1->noway=1;
//
// interaction1->pickunbiased=0;
// return 0; // there is no way it's going through the ice
// }
//
// int count1=0;
// int count2=0;
//
//
// if (Ray::WhereDoesItLeave(0,thisr_in,interaction1->nnu,antarctica,thisnuexitearth)) { // where does it leave Earth
// // really want to find where it leaves ice
// int err;
// // Does it leave in an ice bin
// if (IceThickness(thisnuexitearth) && thisnuexitearth.Lat()<COASTLINE) { // if this is an ice bin in the Antarctic
// //cout << "inu is " << inu << " it's in ice.\n";
// //cout << "this is an ice bin.\n";
// thisnuexitice=thisnuexitearth;
// thisr_exitice=thisnuexitearth;
// if (thisnuexitice.Mag()>Surface(thisnuexitice)) { // if the exit point is above the surface
// if ((thisnuexitice.Mag()-Surface(thisnuexitice))/cos(interaction1->nnu.Theta())>5.E3) {
// WhereDoesItExitIce(inu,thisnuexitearth,interaction1->nnu,5.E3, // then back up and find it more precisely
// thisr_exitice);
// thisnuexitice=(5000.)*interaction1->nnu;
// thisnuexitice+=thisr_exitice;
// count1++;
// }
// if ((thisnuexitice.Mag()-Surface(thisnuexitice))/cos(interaction1->nnu.Theta())>5.E2) {
//
// WhereDoesItExitIce(inu,thisnuexitice,interaction1->nnu,5.E2, // then back up and find it more precisely
// thisr_exitice);
// thisnuexitice=5.E2*interaction1->nnu;
// thisnuexitice+=thisr_exitice;
// count1++;
// }
// if ((thisnuexitice.Mag()-Surface(thisnuexitice))/cos(interaction1->nnu.Theta())>50.) {
//
// WhereDoesItExitIce(inu,thisnuexitice,interaction1->nnu,50., // then back up and find it more precisely
// thisr_exitice);
// count1++;
// } // end third wheredoesitexit
// thisnuexitice=thisr_exitice;
// } // if the exit point overshoots
// else
// thisnuexitice=thisnuexitearth;
//
// // should also correct for undershooting
// if (count1>10)
// cout << "count1 is " << count1 << "\n";
// } // if it's an Antarctic ice bin
// else { // it leaves a rock bin so back up and find where it leaves ice
// //cout << "inu is " << inu << " it's in rock.\n";
// if (thisr_in.Distance(thisnuexitearth)>5.E4) {
// count2++;
// if (WhereDoesItExitIce(inu,thisnuexitearth,interaction1->nnu,5.E4, // then back up and find it more precisely
// thisr_exitice)) {
//
// thisnuexitice=(5.E4)*interaction1->nnu;
// thisnuexitice+=thisr_exitice;
// //cout << "inu is " << inu << " I'm here 1.\n";
//
// }
// else {
// interaction1->neverseesice=1;
// interaction1->pickunbiased = 0;
// return 0;
// }
// }
// else
// thisnuexitice=thisnuexitearth;
// // WhereDoesItExitIce(inu,thisnuexit,interaction1->nnu,5.E4, // then back up and find it more precisely
// // thisr_exitice);
// // thisnuexit=5.E4*interaction1->nnu;
// // thisnuexit+=thisr_exitice;
// if (thisr_in.Distance(thisnuexitice)>5.E3) {
//
//
// if (WhereDoesItExitIce(inu,thisnuexitice,interaction1->nnu,5.E3, // then back up and find it more precisely
// thisr_exitice)) {
// count2++;
// //interaction1->neverseesice=1;
// thisnuexitice=5.E3*interaction1->nnu;
// thisnuexitice+=thisr_exitice;
// //cout << "inu is " << inu << " I'm here 2\n";
// //return 0;
//
// }
// }
// if (thisr_in.Distance(thisnuexitice)>5.E2) {
//
//
// if (WhereDoesItExitIce(inu,thisnuexitice,interaction1->nnu,5.E2, // then back up and find it more precisely
// thisr_exitice)) {
// count2++;
// //interaction1->neverseesice=1;
//
// thisnuexitice=5.E2*interaction1->nnu;
// thisnuexitice+=thisr_exitice;
// //cout << "inu is " << inu << " I'm here 3\n";
// //return 0;
// }
//
// }
// if (thisr_in.Distance(thisnuexitice)>50.) {
//
//
// if (WhereDoesItExitIce(inu,thisnuexitice,interaction1->nnu,50., // then back up and find it more precisely
// thisr_exitice)) {
// //interaction1->neverseesice=1;
// count2++;
// //cout << "inu is " << inu << " I'm here 4\n";
// //return 0;
// }
// }
// thisnuexitice=thisr_exitice;
// if (count2>10)
// cout << "count1 is " << count2 << "\n";
// // else return 0; // never reaches any ice or is it because our step is too big
// } // if the nu leaves a rock bin
// } // end wheredoesitleave
// else {
// interaction1->wheredoesitleave_err=1;
// interaction1->pickunbiased = 0;
// return 0;
// }
// // end finding where it leaves ice
//
// // if (thisnuexit.Mag()<Surface(thisnuexit)) { // if the exit point is below the surface
// // WhereDoesItExitIceForward(thisnuexit,interaction1->nnu,20., // then find it more finely
// // thisr_exitice);
// // thisnuexit=thisr_enterice;
// // // then back up and find it more precisely
// // }
//
// if (WhereDoesItEnterIce(thisnuexitearth,interaction1->nnu,5.E3, // first pass with sort of course binning
// thisr_enterice)) {
// thisr_enterice_tmp=thisr_enterice+5.E3*interaction1->nnu;
// //cout << "inu is " << inu << " thisr_enterice is ";thisr_enterice.Print();
// if (WhereDoesItEnterIce(thisr_enterice_tmp,interaction1->nnu,20., // second pass with finer binning
// thisr_enterice)) {
// //cout << "inu is " << inu << " thisr_enterice is ";thisr_enterice.Print();
// //cout << "entersice is ";thisr_enterice.Print();
// //cout << "thisnuexitice is ";thisnuexitice.Print();
// interaction1->pathlength_inice=thisr_enterice.Distance(thisnuexitice);
// //cout << "distance is " << distance << "\n";
// //cout << "inu " << inu << " thisr_enterice, thisnuexitice are ";thisr_enterice.Print();thisnuexitice.Print();
// interaction1->posnu=interaction1->pathlength_inice*gRandom->Rndm()*interaction1->nnu;
// interaction1->posnu=interaction1->posnu+thisr_enterice;
// //cout << "inu" << inu << " thisr_enterice, thisnuexitice are ";thisr_enterice.Print();thisnuexitice.Print();
// //cout << "inu " << inu << " distance is " << distance << "\n";
// }
// }
// else {
// thisr_enterice=thisr_in;
// interaction1->wheredoesitenterice_err=1;
// interaction1->pickunbiased = 0;
// return 0;
// }
// interaction1->nuexitice=thisnuexitice;
// interaction1->r_enterice=thisr_enterice;
//
// if (interaction1->posnu.Mag()-Surface(interaction1->posnu)>0) {
// interaction1->toohigh=1;
// //cout << "inu, toohigh is " << inu << " " << interaction1->toohigh << "\n";
// interaction1->pickunbiased = 0;
// return 0;
// }
// if (interaction1->posnu.Mag()-Surface(interaction1->posnu)+IceThickness(interaction1->posnu)<0) {
// interaction1->toolow=1;
// //cout << "inu, toolow is " << inu << " " << interaction1->toolow << "\n";
// interaction1->pickunbiased = 0;
// return 0;
// }
// interaction1->pickunbiased = 1;
// return 1;
//
// }
//--------------------------------------------------
//--------------------------------------------------
// int IceModel::PickNear() {
// }
//--------------------------------------------------
Vector IceModel::GetSurfaceNormal(const Position &r_out) const {
Vector n_surf = r_out.Unit();
if (FLATSURFACE)
return n_surf;
if (ice_model==0) {
double theta=r_out.Theta();
int ilon,ilat;
GetILonILat(r_out,ilon,ilat);
int ilon_previous=ilon-1;
if (ilon_previous<0)
ilon_previous=NLON-1;
int ilon_next=ilon+1;
if (ilon_next==NLON)
ilon_next=0;
double r=(geoid[ilat]+surfacer[ilon][ilat])*sin(theta);
double slope_phi=(surfacer[ilon_next][ilat]-surfacer[ilon_previous][ilat])/(r*2*phistep);
int ilat_previous=ilat-1;
if (ilat_previous<0)
ilat_previous=0;
int ilat_next=ilat+1;
if (ilat_next==NLAT)
ilat_next=NLAT-1;
double slope_costheta=(surfacer[ilon][ilat_next]-surfacer[ilon][ilat_previous])/((geoid[ilat]+surfacer[ilon][ilat])*2*thetastep);
// first rotate n_surf according to tilt in costheta and position on continent - rotate around the y axis.
double angle=atan(slope_costheta);
n_surf = n_surf.RotateY(angle);
// now rotate n_surf according to tilt in phi - rotate around the z axis.
angle=atan(slope_phi);
n_surf = n_surf.RotateZ(angle);
} //end if(Crust 2.0)
else if (ice_model==1) {
double dist_to_check = 7500; //check elevations at this distance north, south, east and west of event
double lon,lat;
double lon_prev,lon_next;
double lat_prev,lat_next;
lon = r_out.Lon();
lat = r_out.Lat(); //longitude and latitude of interaction
double local_surface_elevation = Surface(lon,lat);
lat_next = lat + dist_to_check * (180 / (local_surface_elevation * PI)); //the latitude 7.5 km south of the interaction
lat_prev = lat - dist_to_check * (180 / (local_surface_elevation * PI)); //the latitude 7.5 km north of the interaction
lon_next = lon + dist_to_check * (180 / (sin(lat*RADDEG) * local_surface_elevation * PI));
lon_prev = lon - dist_to_check * (180 / (sin(lat*RADDEG) * local_surface_elevation * PI));
if (lat_next > 90) {
//cout<<"lat_next is > 90"<<endl;
lat_next = 90 - (lat_next - 90); //if we went past the pole, set coordinates for the other side
lon_next += 180;
lon_prev += 180;
} //end if
//cout<<"lon, lat: "<<lon<<" , "<<lat<<endl;
//correct any out of range longitudes
if (lon_next > 360) {
//cout<<"lon_next > 360\n";
lon_next -= 360;
}
else if (lon_next < 0) {
//cout<<"lon_next < 0\n";
lon_next += 360;
}
if (lon_prev > 360) {
//cout<<"lon_prev > 360\n";
lon_prev -= 360;
}
else if (lon_prev < 0) {
//cout << "lon_prev < 0";
lon_prev += 360;
}
double slope_phi=(SurfaceAboveGeoid(lon_next,lat)-SurfaceAboveGeoid(lon_prev,lat))/(2*dist_to_check);
double slope_costheta=(SurfaceAboveGeoid(lon,lat_next)-SurfaceAboveGeoid(lon,lat_prev))/(2*dist_to_check);
// first rotate n_surf according to tilt in costheta - rotate around the y axis.
double angle=atan(slope_costheta);
n_surf = n_surf.RotateY(angle);
// now rotate n_surf according to tilt in phi - rotate around the z axis.
angle=atan(slope_phi);
n_surf = n_surf.RotateZ(angle);
} //end if(BEDMAP)
return n_surf;
} //method GetSurfaceNormal
Position IceModel::WhereDoesItEnterIce(const Position &posnu,
const Vector &nnu,
double stepsize) const {
// now get exit point...
// see my geometry notes.
// parameterize the neutrino trajectory and just see where it
// crosses the earth radius.
Position r_enterice;
double distance=0;
int left_edge=0;
Position x = posnu;
double x2;
Position x_previous = posnu;
double x_previous2= x_previous * x_previous;
x2=x_previous2;
double lon = x.Lon(),lat = x.Lat();
double lon_old = lon,lat_old = lat;
double local_surface = Surface(lon,lat);
double rock_previous2= pow((local_surface - IceThickness(lon,lat) - WaterDepth(lon,lat)),2);
double surface_previous2=pow(local_surface,2);
double rock2=rock_previous2;
double surface2=surface_previous2;
while (distance<2*local_surface+1000) {
distance+=stepsize;
x -= stepsize*nnu;
x2=x*x;
lon = x.Lon();
lat = x.Lat();
if (lon!=lon_old || lat!=lat_old) {
local_surface = Surface(lon,lat);
if (lat>COASTLINE)
left_edge=1;
rock2=pow((local_surface - IceThickness(lon,lat) - WaterDepth(lon,lat)),2);
surface2=pow(local_surface,2);
if (ice_model==0) {
if ((int)(lat)==COASTLINE && rock_previous2 < x2 && surface2 > x2)
left_edge=1;
} //if (Crust 2.0)
} //if (neutrino has stepped into new lon/lat bin)
if ((x_previous2>rock_previous2 && x2<rock2)
|| (x_previous2<surface_previous2 && x2>surface2)
|| left_edge) {
r_enterice = x;
// this gets you out of the loop.
distance=3*Geoid(lat);
} //if
x_previous = x;
x_previous2 = x2;
if (lon!=lon_old || lat!=lat_old) {
rock_previous2 = rock2;
surface_previous2 = surface2;
lat_old = lat;
lon_old = lon;
} //if
} //while
return r_enterice;
}//WhereDoesItEnterIce
Position IceModel::WhereDoesItEnter(const Position &posnu,const Vector &nnu) const {
// now get neutrino entry point...
// cout << posnu.GetX() << " : " << posnu.GetY() << " : " << posnu.GetZ() << endl;
// cout << posnu.R() << " : " << posnu.Theta() << " : " << posnu.Phi() << endl;
// cout << posnu.Lon() << " : " << posnu.Lat() << endl;
double p = posnu.Mag(); // radius of interaction
double costheta = (nnu*posnu) / p; // theta of neutrino at interaction position
double sintheta = sqrt(1-costheta*costheta);
double lon = posnu.Lon();
double lat = posnu.Lat();
double a=0; // length of chord
double R = Surface(lon,lat);
double delta = R - p; // depth of the interaction
// if interaction occurs below surface, as it should
if (delta>-0.001) {
a=p*costheta+sqrt(R*R*costheta*costheta+2*delta*R*sintheta*sintheta); // chord length
if (a<0) {
cout << "Negative chord length: " << a << "\n";
} //end if
} //end if (interaction below surface)
else if (delta<=-0.001) {
//cout << "Error in interaction position. whichray is " << whichray << "\n";
// cout << "lon, lat from WhereDoesItEnter is " << " " << lon << " " << lat << "\n";
// cout << "geoid, surface, p, surface-p are " << Geoid(lat) << " " << Surface(lon,lat) << ", " << p << " , "<<(Surface(lon,lat)-p)<<"\n";
} //else if: error: interaction takes place above the surface
// first approx
Position r_in = posnu - a*nnu;
int iter = 0;
// now do correction 3 times
//for (iter=0; iter<3; iter++) {
// delta = r_in.Mag() - Surface( r_in );
// r_in = r_in + (delta * nnu);
//}
delta = r_in.Mag() - Surface( r_in );
while ( fabs(delta) >= 0.1 ) {
r_in = r_in + (delta * nnu);
delta = r_in.Mag() - Surface( r_in );
iter++;
if ( iter > 10 ) {
//cout<<"\n r_in iteration more than 10 times!!! delta : "<<delta<<". now set r_in as before."<<endl;
r_in = Surface( r_in ) * r_in.Unit(); // the way before
delta = r_in.Mag() - Surface( r_in );
}
}
//lon = r_in.Lon();
//lat = r_in.Lat();
//r_in = Surface(lon,lat) * r_in.Unit();
return r_in;
} //method WhereDoesItEnter
int IceModel::WhereDoesItEnter_sphere(const Position &sphere_in, const Vector &nnu, Position &r_in ) const {
double p = sphere_in.Mag(); // radius of interaction
double costheta = (nnu*sphere_in) / p; // theta of neutrino at interaction position
double sintheta = sqrt(1-costheta*costheta);
double lon = sphere_in.Lon();
double lat = sphere_in.Lat();
double a=0; // length of chord
double R = Surface(lon,lat);
double delta = R - p; // depth of the interaction
// if interaction occurs below surface, as it should
// if sphere_in is inside the earth
if (delta>-0.001) {
//a=p*costheta+sqrt(R*R*costheta*costheta+2*delta*R*sintheta*sintheta); // chord length
a=p*costheta + sqrt(R*R-p*p*sintheta*sintheta); // chord length
if (a<0) {
cout << "Negative chord length: " << a << "\n";
} //end if
// first approx
r_in = sphere_in - a*nnu;
} //end if (sphere_in below surface)
// if sphere_in is outside the earth
else if (delta<=-0.001) {
// D : shortest distance between earth center and neutrino trajectory
Position D = sphere_in + (p*costheta)*nnu;
// neutrino pass through the earth
if ( D.Mag() < Surface(D) ) {
// first approx
r_in = sphere_in - (sqrt(R*R-D.Mag()*D.Mag())+costheta*p)*nnu;
}
// neutrino don't pass through the earth
else {
return 0;
}
} //else if (sphere_in above surface)
int iter = 0;
// now do correction 3 times
//for (iter=0; iter<3; iter++) {
// delta = r_in.Mag() - Surface( r_in );
// r_in = r_in + (delta * nnu);
//}
delta = r_in.Mag() - Surface( r_in );
while ( fabs(delta) >= 0.1 ) {
r_in = r_in + (delta * nnu);
delta = r_in.Mag() - Surface( r_in );
iter++;
if ( iter > 10 ) {
//cout<<"\n r_in iteration more than 10 times!!! delta : "<<delta<<". now set r_in as before."<<endl;
r_in = Surface( r_in ) * r_in.Unit(); // the way before
delta = r_in.Mag() - Surface( r_in );
}
}
// we found r_in properly
return 1;
} //method WhereDoesItEnter_new
Position IceModel::WhereDoesItLeave(const Position &posnu,const Vector &nnu) const {
// now get neutrino entry point...
double p = posnu.Mag(); // radius of interaction
double costheta = (nnu*posnu) / p; // theta of neutrino at interaction position
double sintheta = sqrt(1-costheta*costheta);
double lon = posnu.Lon();
double lat = posnu.Lat();
double a=0; // length of chord
double R = Surface(lon,lat);
double delta = R - p; // depth of the interaction
// if interaction occurs below surface, as it should
if (delta>-0.001) {
a=sqrt(R*R*costheta*costheta+2*delta*R*sintheta*sintheta) - p*costheta; // chord length
if (a<0) {
cout << "Negative chord length: " << a << "\n";
} //end if
} //end if (interaction below surface)
else if (delta<=-0.001) {
//cout << "Error in interaction position. whichray is " << whichray << "\n";
// cout << "lon, lat from WhereDoesItLeave is " << " " << lon << " " << lat << "\n";
// cout << "geoid, surface, p, surface-p are " << Geoid(lat) << " " << Surface(lon,lat) << " " << p << " , "<<(Surface(lon,lat)-p)<<"\n";
} //else if: error: interaction takes place above the surface
Position r_in = posnu + a*nnu;
lon = r_in.Lon();
lat = r_in.Lat();
r_in = Surface(lon,lat) * r_in.Unit();
return r_in;
} //method WhereDoesItLeave
// Below WhereDoesItEnterIce is from icemodel in icemc.
//--------------------------------------------------
// int IceModel::WhereDoesItEnterIce(const Position &posnu,
// const Vector &nnu,
// double stepsize,
// Position &r_enterice) {
// // now get exit point...
// // see my geometry notes.
// // parameterize the neutrino trajectory and just see where it
// // crosses the earth radius.
//
// // Position r_enterice;
// double distance=0;
// int left_edge=0;
// Position x = posnu;
// double x2;
//
// Position x_previous = posnu;
//
// double x_previous2= x_previous * x_previous;
// x2=x_previous2;
//
// double lon = x.Lon(),lat = x.Lat();
// double lon_old = lon,lat_old = lat;
// double local_surface = Surface(lon,lat);
// double rock_previous2= pow((local_surface - IceThickness(lon,lat) - WaterDepth(lon,lat)),2);
// double surface_previous2=pow(local_surface,2);
//
// double rock2=rock_previous2;
// double surface2=surface_previous2;
// int foundit=0; // keeps track of whether you found an ice entrance point
//
// // cout << "lon, lat are " << posnu.Lon() << " " << posnu.Lat() << "\n";
// //cout << "x2 at start is " << x2 << "\n";
// while (distance<2*local_surface+1000) {
//
// distance+=stepsize;
//
// x -= stepsize*nnu;
// x2=x*x;
// //cout << "x2 is " << x2 << "\n";
// lon = x.Lon();
// lat = x.Lat();
//
// double ice_thickness=IceThickness(lon,lat);
// if (lon!=lon_old || lat!=lat_old) {
// local_surface = Surface(lon,lat);
//
// //if (lat>COASTLINE)
// //left_edge=1;
//
// rock2=pow((local_surface - IceThickness(lon,lat) - WaterDepth(lon,lat)),2);
// surface2=pow(local_surface,2);
//
// if (ice_model==0) {
// if ((int)(lat)==COASTLINE && rock_previous2 < x2 && surface2 > x2)