Satellite Orbit Basic Analyses: Grizu-263

This is the collected analyses page for any given satellite with a TLE. It has been originally created for Grizu-263 Pocket Cube satellite. Changing the TLE, and the analysis duration, properties of any satellite can be displayed.

We start with the satellite name and TLE.

from satmad.propagation.tle import TLE

name = "grizu263a-1"
line1 = "1 70303C 22002C   22013.68470752  .00096070  00000-0  54745-2 0    08"
line2 = "2 70303  97.5130  83.3559 0014114 249.8235 114.5865 15.12766675    14"

tle = TLE.from_tle(line1, line2, name)

print("TLE epoch : " + tle.epoch.isot)

TLE epoch : 2022-01-13T16:25:58.730

The next step is to define the propagation/analysis duration. In this example the propagation starts at “2022-01-14T00:00:00” and lasts for 5.0 days, with a stepsize of 120 seconds.

from satmad.propagation.sgp4_propagator import SGP4Propagator
from astropy import units as u
from astropy.time import Time
from satmad.utils.timeinterval import TimeInterval

# init SGP4
sgp4 = SGP4Propagator(stepsize=120 * u.s)

#  Propagate 5 days into future
interval = TimeInterval(Time("2022-01-14T00:00:00", scale="utc"), 5.0 * u.day)
trajectory = sgp4.gen_trajectory(tle, interval)

print(trajectory)

Trajectory from 2022-01-14T00:00:00.000 to 2022-01-19T00:00:00.000 in frame gcrs. (Interpolators initialised: False)

Now that the propagation has been carried out, we can compute the eclipse (Umbra) times. Penumbra times are also calculated automatically.

from satmad.core.celestial_bodies_lib import EARTH,  SUN
from satmad.core.occultation import occultation_intervals

# Compute occultation intervals
umbra_intervals, penumbra_intervals = occultation_intervals(
    trajectory, EARTH, illum_body=SUN, ephemeris="builtin"
)

print("Umbra Start-End Intervals:")
print(umbra_intervals)

Umbra Start-End Intervals:
[ 2022-01-14T00:10:02.287  2022-01-14T00:42:56.459 ]
[ 2022-01-14T01:45:16.859  2022-01-14T02:18:10.976 ]
[ 2022-01-14T03:20:31.384  2022-01-14T03:53:25.440 ]
[ 2022-01-14T04:55:45.856  2022-01-14T05:28:39.860 ]
[ 2022-01-14T06:31:00.283  2022-01-14T07:03:54.229 ]
[ 2022-01-14T08:06:14.661  2022-01-14T08:39:08.549 ]
[ 2022-01-14T09:41:28.987  2022-01-14T10:14:22.824 ]
[ 2022-01-14T11:16:43.269  2022-01-14T11:49:37.045 ]
[ 2022-01-14T12:51:57.498  2022-01-14T13:24:51.220 ]
[ 2022-01-14T14:27:11.680  2022-01-14T15:00:05.346 ]
[ 2022-01-14T16:02:25.814  2022-01-14T16:35:19.421 ]
[ 2022-01-14T17:37:39.895  2022-01-14T18:10:33.452 ]
[ 2022-01-14T19:12:53.932  2022-01-14T19:45:47.430 ]
[ 2022-01-14T20:48:07.918  2022-01-14T21:21:01.360 ]
[ 2022-01-14T22:23:21.854  2022-01-14T22:56:15.243 ]
[ 2022-01-14T23:58:35.744  2022-01-15T00:31:29.074 ]
[ 2022-01-15T01:33:49.581  2022-01-15T02:06:42.859 ]
[ 2022-01-15T03:09:03.372  2022-01-15T03:41:56.593 ]
[ 2022-01-15T04:44:17.114  2022-01-15T05:17:10.278 ]
[ 2022-01-15T06:19:30.804  2022-01-15T06:52:23.918 ]
[ 2022-01-15T07:54:44.449  2022-01-15T08:27:37.503 ]
[ 2022-01-15T09:29:58.042  2022-01-15T10:02:51.043 ]
[ 2022-01-15T11:05:11.587  2022-01-15T11:38:04.534 ]
[ 2022-01-15T12:40:25.083  2022-01-15T13:13:17.973 ]
[ 2022-01-15T14:15:38.528  2022-01-15T14:48:31.367 ]
[ 2022-01-15T15:50:51.927  2022-01-15T16:23:44.709 ]
[ 2022-01-15T17:26:05.275  2022-01-15T17:58:58.003 ]
[ 2022-01-15T19:01:18.574  2022-01-15T19:34:11.249 ]
[ 2022-01-15T20:36:31.825  2022-01-15T21:09:24.442 ]
[ 2022-01-15T22:11:45.023  2022-01-15T22:44:37.590 ]
[ 2022-01-15T23:46:58.177  2022-01-16T00:19:50.687 ]
[ 2022-01-16T01:22:11.279  2022-01-16T01:55:03.735 ]
[ 2022-01-16T02:57:24.331  2022-01-16T03:30:16.736 ]
[ 2022-01-16T04:32:37.336  2022-01-16T05:05:29.684 ]
[ 2022-01-16T06:07:50.289  2022-01-16T06:40:42.586 ]
[ 2022-01-16T07:43:03.195  2022-01-16T08:15:55.437 ]
[ 2022-01-16T09:18:16.051  2022-01-16T09:51:08.239 ]
[ 2022-01-16T10:53:28.856  2022-01-16T11:26:20.994 ]
[ 2022-01-16T12:28:41.616  2022-01-16T13:01:33.696 ]
[ 2022-01-16T14:03:54.322  2022-01-16T14:36:46.352 ]
[ 2022-01-16T15:39:06.981  2022-01-16T16:11:58.957 ]
[ 2022-01-16T17:14:19.591  2022-01-16T17:47:11.512 ]
[ 2022-01-16T18:49:32.148  2022-01-16T19:22:24.021 ]
[ 2022-01-16T20:24:44.661  2022-01-16T20:57:36.476 ]
[ 2022-01-16T21:59:57.120  2022-01-16T22:32:48.885 ]
[ 2022-01-16T23:35:09.532  2022-01-17T00:08:01.244 ]
[ 2022-01-17T01:10:21.894  2022-01-17T01:43:13.552 ]
[ 2022-01-17T02:45:34.205  2022-01-17T03:18:25.814 ]
[ 2022-01-17T04:20:46.470  2022-01-17T04:53:38.022 ]
[ 2022-01-17T05:55:58.682  2022-01-17T06:28:50.184 ]
[ 2022-01-17T07:31:10.846  2022-01-17T08:04:02.296 ]
[ 2022-01-17T09:06:22.961  2022-01-17T09:39:14.357 ]
[ 2022-01-17T10:41:35.023  2022-01-17T11:14:26.372 ]
[ 2022-01-17T12:16:47.041  2022-01-17T12:49:38.333 ]
[ 2022-01-17T13:51:59.005  2022-01-17T14:24:50.248 ]
[ 2022-01-17T15:27:10.920  2022-01-17T16:00:02.112 ]
[ 2022-01-17T17:02:22.787  2022-01-17T17:35:13.925 ]
[ 2022-01-17T18:37:34.602  2022-01-17T19:10:25.693 ]
[ 2022-01-17T20:12:46.371  2022-01-17T20:45:37.406 ]
[ 2022-01-17T21:47:58.087  2022-01-17T22:20:49.073 ]
[ 2022-01-17T23:23:09.754  2022-01-17T23:56:00.689 ]
[ 2022-01-18T00:58:21.372  2022-01-18T01:31:12.254 ]
[ 2022-01-18T02:33:32.938  2022-01-18T03:06:23.774 ]
[ 2022-01-18T04:08:44.459  2022-01-18T04:41:35.239 ]
[ 2022-01-18T05:43:55.926  2022-01-18T06:16:46.658 ]
[ 2022-01-18T07:19:07.344  2022-01-18T07:51:58.025 ]
[ 2022-01-18T08:54:18.714  2022-01-18T09:27:09.343 ]
[ 2022-01-18T10:29:30.031  2022-01-18T11:02:20.614 ]
[ 2022-01-18T12:04:41.302  2022-01-18T12:37:31.830 ]
[ 2022-01-18T13:39:52.519  2022-01-18T14:12:43.000 ]
[ 2022-01-18T15:15:03.690  2022-01-18T15:47:54.119 ]
[ 2022-01-18T16:50:14.809  2022-01-18T17:23:05.188 ]
[ 2022-01-18T18:25:25.878  2022-01-18T18:58:16.210 ]
[ 2022-01-18T20:00:36.899  2022-01-18T20:33:27.177 ]
[ 2022-01-18T21:35:47.866  2022-01-18T22:08:38.099 ]
[ 2022-01-18T23:10:58.787  2022-01-18T23:43:48.968 ]