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tests for mldsgp4
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‎dsgp4/util.py

+1-1
Original file line numberDiff line numberDiff line change
@@ -51,7 +51,7 @@ def propagate_batch(tles, tsinces, initialized=True):
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"""
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from .sgp4_batched import sgp4_batched
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if not initialized:
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initialize_tle(tles)
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_,tles=initialize_tle(tles)
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state=sgp4_batched(tles, tsinces)
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return state
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‎tests/test_mldsgp4.py

+374
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,374 @@
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import dsgp4
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import numpy as np
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import random
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import torch
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import unittest
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error_string="Error: deep space propagation not supported (yet). The provided satellite has \
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an orbital period above 225 minutes. If you want to let us know you need it or you want to \
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contribute to implement it, open a PR or raise an issue at: https://github.com/esa/dSGP4."
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class UtilTestCase(unittest.TestCase):
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def test_mldsgp4_single_tles(self):
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lines=file.splitlines()
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#I randomly select 50 indexes out of 500 satellites
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indexes=list(range(1,len(lines),3))
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tles=[]
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for i in indexes:
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data=[]
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data.append(lines[i])
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data.append(lines[i+1])
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data.append(lines[i+2])
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tles.append(dsgp4.tle.TLE(data))
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#let's load the ML-dSGP4 model without input/output correction
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#this should correspond to just SGP4
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ml_dsgp4=dsgp4.mldsgp4(hidden_size=35,
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input_correction=0.,
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output_correction=0.,
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normalization_R=6958.137,
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normalization_V=7.947155867983262)
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#random times:
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tsinces=torch.rand(len(tles),)*10000
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for tle in tles:
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#we first propagate with the ML-dSGP4:
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try:
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#we use torch.no_grad() to avoid keeping track of the derivatives:
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with torch.no_grad():
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states_mldsgp4_out=ml_dsgp4(tle,tsinces)
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#let's unnormalize the output:
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states_mldsgp4_out[:,:3]*=ml_dsgp4.normalization_R
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states_mldsgp4_out[:,3:]*=ml_dsgp4.normalization_V
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except Exception as e:
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self.assertTrue((str(e).split()==error_string.split()))
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#now with the SGP4:
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try:
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states_dsgp4_out=dsgp4.propagate(tle, tsinces, initialized=False)
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except Exception as e:
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self.assertTrue((str(e).split()==error_string.split()))
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#testing the results:
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self.assertTrue(np.allclose(states_mldsgp4_out.detach().numpy().reshape(-1,2,3),states_dsgp4_out.detach().numpy(),atol=1e-13))
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def test_mldsgp4_batch_tles(self):
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lines=file.splitlines()
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#I randomly select 50 indexes out of 500 satellites
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indexes=list(range(1,len(lines),3))
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tles=[]
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for i in indexes:
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data=[]
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data.append(lines[i])
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data.append(lines[i+1])
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data.append(lines[i+2])
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tles.append(dsgp4.tle.TLE(data))
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tles=tles[:20]
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#let's load the ML-dSGP4 model without input/output correction
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#this should correspond to just SGP4
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ml_dsgp4=dsgp4.mldsgp4(hidden_size=35,
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input_correction=0.,
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output_correction=0.,
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normalization_R=6958.137,
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normalization_V=7.947155867983262)
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#we now create a batch of TLE to later propagate it
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tles_=[]
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for tle in tles:
74+
tles_+=[tle]*100
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tsinces = torch.cat([torch.linspace(0,24*60,100)]*len(tles))
76+
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#we first propagate with the ML-dSGP4 and we use torch.no_grad() to avoid keeping track of the derivatives:
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with torch.no_grad():
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states_mldsgp4_out=ml_dsgp4(tles_,tsinces)
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#let's unnormalize the output:
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states_mldsgp4_out[:,:3]*=ml_dsgp4.normalization_R
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states_mldsgp4_out[:,3:]*=ml_dsgp4.normalization_V
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states_dsgp4_out=dsgp4.propagate_batch(tles_, tsinces, initialized=False)
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#testing the results:
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self.assertTrue(np.allclose(states_mldsgp4_out.detach().numpy().reshape(-1,2,3),states_dsgp4_out.detach().numpy(),atol=1e-12))
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file="""
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2 34760 74.0644 223.2292 0102496 251.3660 284.0339 14.15081754672644
311+
0 COSMOS 2251 DEB
312+
1 34761U 93036AAF 22068.52064119 .00000971 00000-0 37594-3 0 9996
313+
2 34761 74.0333 358.0392 0041935 5.3956 354.7637 14.30896942680097
314+
0 COSMOS 2251 DEB
315+
1 34763U 93036AAH 22068.78065034 .00008832 00000-0 18512-2 0 9995
316+
2 34763 74.1730 313.6296 0064750 119.4211 308.0251 14.58493953683870
317+
0 IRIDIUM 33 DEB
318+
1 34764U 97051LH 22068.57543325 .00054250 00000-0 39325-2 0 9998
319+
2 34764 86.3538 178.2573 0005954 260.8955 99.1605 15.03689251694515
320+
0 IRIDIUM 33 DEB
321+
1 34765U 97051LJ 22068.78051463 .00000657 00000-0 22352-3 0 9994
322+
2 34765 86.3366 258.8957 0018995 46.0804 323.8526 14.35014857678780
323+
0 IRIDIUM 33 DEB
324+
1 34773U 97051LS 22068.71126542 .00004841 00000-0 10962-2 0 9999
325+
2 34773 86.4072 264.8974 0017105 72.0967 288.2104 14.55898486688104
326+
0 IRIDIUM 33 DEB
327+
1 34774U 97051LT 22069.05934824 .00004012 00000-0 79091-3 0 9997
328+
2 34774 86.4186 259.0488 0021525 326.6878 158.1491 14.62151183690726
329+
0 IRIDIUM 33 DEB
330+
1 34775U 97051LU 22068.81064666 .00002627 00000-0 74056-3 0 9995
331+
2 34775 86.3753 269.4146 0026287 281.8282 89.7599 14.45272552682299
332+
0 COMPASS G2
333+
1 34779U 09018A 22068.02701842 -.00000151 00000-0 00000-0 0 9998
334+
2 34779 8.2706 50.6554 0319604 249.7419 106.8765 0.94516854 47397
335+
0 CZ-3C R/B
336+
1 34780U 09018B 22069.16415195 .00005617 00000-0 24655-2 0 9994
337+
2 34780 20.7006 321.7320 7131875 39.9300 354.9073 2.45578427112046
338+
0 COSMOS 2251 DEB
339+
1 34784U 93036AAM 22068.36638343 .00000887 00000-0 22329-3 0 9995
340+
2 34784 74.0090 52.3058 0060054 197.0015 162.9136 14.51648502685406
341+
0 COSMOS 2251 DEB
342+
1 34787U 93036AAQ 22069.09891571 .00006428 00000-0 10002-2 0 9994
343+
2 34787 74.0161 309.5714 0013326 73.4927 286.7708 14.73138766692625
344+
0 COSMOS 2251 DEB
345+
1 34788U 93036AAR 22068.94122777 .00003389 00000-0 29271-3 0 9995
346+
2 34788 73.9903 280.8094 0134553 31.4587 33.2058 14.90884651707015
347+
0 COSMOS 2251 DEB
348+
1 34789U 93036AAS 22068.79813514 .00004225 00000-0 14561-2 0 9990
349+
2 34789 74.2048 192.1639 0103795 18.1297 106.5324 14.33192302674468
350+
0 COSMOS 2251 DEB
351+
1 34790U 93036AAT 22068.77443678 .00000752 00000-0 35584-3 0 9990
352+
2 34790 74.0573 182.7815 0109231 218.6289 269.6003 14.18323488670567
353+
0 COSMOS 2251 DEB
354+
1 34791U 93036AAU 22068.74233478 .00008295 00000-0 85591-3 0 9996
355+
2 34791 74.0186 83.2071 0046207 213.6720 146.1524 14.89529078701119
356+
0 COSMOS 2251 DEB
357+
1 34792U 93036AAV 22068.52062462 .00001556 00000-0 48324-3 0 9992
358+
2 34792 74.0244 222.0367 0016818 284.6326 138.2886 14.41827284677664
359+
0 COSMOS 2251 DEB
360+
1 34793U 93036AAW 22068.80776917 .00000342 00000-0 12642-3 0 9997
361+
2 34793 74.0020 260.9066 0053385 18.5431 353.3504 14.35371548675985
362+
0 COSMOS 2251 DEB
363+
1 34796U 93036AAZ 22068.93184426 .00000768 00000-0 23839-3 0 9994
364+
2 34796 74.0333 248.2516 0116421 327.7024 155.9459 14.39028736682118
365+
0 COSMOS 2251 DEB
366+
1 34797U 93036ABA 22068.80523530 .00001512 00000-0 62383-3 0 9999
367+
2 34797 73.9824 95.8766 0092337 161.8617 198.5862 14.25350974677447
368+
0 RISAT 2
369+
1 34807U 09019A 22069.20015293 .00039560 00000-0 69476-3 0 9990
370+
2 34807 41.2102 146.3902 0010166 13.1639 10.3869 15.49708764724344
371+
0 BLOCK DM-SL R/B
372+
1 34811U 09020B 22068.85335389 -.00000141 00000-0 00000-0 0 9997
373+
2 34811 2.0707 53.4388 4737112 332.3433 217.9075 1.81487904 85390
374+
"""

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