{
"info": {
"author": "Brandon Rhodes",
"author_email": "brandon@rhodesmill.org",
"bugtrack_url": null,
"classifiers": [
"Development Status :: 5 - Production/Stable",
"Intended Audience :: Science/Research",
"License :: OSI Approved :: MIT License",
"Programming Language :: Python :: 2",
"Programming Language :: Python :: 2.6",
"Programming Language :: Python :: 2.7",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3.2",
"Programming Language :: Python :: 3.3",
"Programming Language :: Python :: 3.4",
"Topic :: Scientific/Engineering :: Astronomy"
],
"description": "This Python package computes the position and velocity of an\nearth-orbiting satellite, given the satellite's TLE orbital elements\nfrom a source like `Celestrak `_. It implements\nthe most recent version of SGP4, and is regularly run against the SGP4\ntest suite to make sure that its satellite position predictions **agree\nto within 0.1\u00a0mm** of the predictions of the standard C++ implementation\nof the algorithm. This error is far less than the 1\u20133\u00a0km/day by which\nsatellites themselves deviate from the ideal orbits described in TLE\nfiles.\n\nThe C++ function names have been retained, since users may already be\nfamiliar with this library in other languages. Here is how to compute\nthe x,y,z position and velocity for Vanguard\u00a01 at 12:50:19 on 29\nJune\u00a02000:\n\n>>> from sgp4.earth_gravity import wgs72\n>>> from sgp4.io import twoline2rv\n>>>\n>>> line1 = ('1 00005U 58002B 00179.78495062 '\n... '.00000023 00000-0 28098-4 0 4753')\n>>> line2 = ('2 00005 34.2682 348.7242 1859667 '\n... '331.7664 19.3264 10.82419157413667')\n>>>\n>>> satellite = twoline2rv(line1, line2, wgs72)\n>>> position, velocity = satellite.propagate(\n... 2000, 6, 29, 12, 50, 19)\n>>>\n>>> print(satellite.error) # nonzero on error\n0\n>>> print(satellite.error_message)\nNone\n>>> print(position)\n(5576.056952..., -3999.371134..., -1521.957159...)\n>>> print(velocity)\n(4.772627..., 5.119817..., 4.275553...)\n\nThe position vector measures the satellite position in **kilometers**\nfrom the center of the earth. The velocity is the rate at which those\nthree parameters are changing, expressed in **kilometers per second**.\n\nThere are three gravity models available that you can import from the\n``earth_gravity`` module:\n\n* ``wgs72``\n* ``wgs72old``\n* ``wgs84``\n\nThe ``wgs72`` model seems to be the most commonly used in the satellite\ntracking community, and is probably the model behind most TLE elements\nthat are available for download.\n\nThe ``twoline2rv()`` function returns a ``Satellite`` object whose\nattributes carry the data loaded from the TLE entry:\n\n* Unique satellite number, as given in the TLE file.\n\n >>> satellite.satnum\n 5\n\n* The epoch of the element set, expressed three ways:\n as the integer year plus the floating point number of days into the year;\n as a floating-point Julian date; and as Python ``datetime`` object.\n\n >>> satellite.epochyr\n 2000\n >>> satellite.epochdays\n 179.78495062\n >>> satellite.jdsatepoch\n 2451723.28495062\n >>> satellite.epoch\n datetime.datetime(2000, 6, 27, 18, 50, 19, 733567)\n\nThis implementation passes all of the automated tests in the August 2010\nrelease of the reference implementation of SGP4 by Vallado et\u00a0al., who\noriginally published their revision of SGP4 in\u00a02006:\n\n Vallado, David A., Paul Crawford, Richard Hujsak, and T.S. Kelso, \u201cRevisiting Spacetrack Report #3,\u201d presented at the AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, 2006 August 21\u201324.\n\nIf you would like to review the paper, it is `available online\n`_. You can\nalways download the latest version of their code for comparison against\nthis Python module (or other implementations) at `AIAA-2006-6753.zip\n`_.\n\nThis module was adapted from Vallado's C++ code since its revision date\nwas the most recently updated SGP4 implementation in their zip file:\n\n* C++, August 2010\n* Fortran, August 2008\n* Pascal, August 2008\n* Matlab, May 2008\n* Java, July 2005\n\nChangelog\n---------\n\n| 2015-01-15 \u2014 1.4 \u2014 Display detailed help when TLE input does not match format.\n| 2014-06-26 \u2014 1.3 \u2014 Return ``(NaN,NaN,NaN)`` vectors on error and set ``.error_message``\n| 2013-11-29 \u2014 1.2 \u2014 Made ``epochyr`` 4 digits; add ``datetime`` for ``.epoch``\n| 2012-11-22 \u2014 1.1 \u2014 Python\u00a03 compatibility; more documentation\n| 2012-08-27 \u2014 1.0 \u2014 Initial release",
"description_content_type": null,
"docs_url": null,
"download_url": "UNKNOWN",
"downloads": {
"last_day": -1,
"last_month": -1,
"last_week": -1
},
"home_page": "https://github.com/brandon-rhodes/python-sgp4",
"keywords": null,
"license": "MIT",
"maintainer": null,
"maintainer_email": null,
"name": "sgp4",
"package_url": "https://pypi.org/project/sgp4/",
"platform": "UNKNOWN",
"project_url": "https://pypi.org/project/sgp4/",
"project_urls": {
"Download": "UNKNOWN",
"Homepage": "https://github.com/brandon-rhodes/python-sgp4"
},
"release_url": "https://pypi.org/project/sgp4/1.4/",
"requires_dist": null,
"requires_python": null,
"summary": "Track earth satellite TLE orbits using up-to-date 2010 version of SGP4",
"version": "1.4"
},
"last_serial": 1384490,
"releases": {
"1.0": [
{
"comment_text": "",
"digests": {
"md5": "2ddc45c529edf273658cdbe77a62a0e2",
"sha256": "e1e99cc792e978838d16cd4967d19de3a7fd01456ea804857f4b7f3b8266dc5b"
},
"downloads": -1,
"filename": "sgp4-1.0.tar.gz",
"has_sig": false,
"md5_digest": "2ddc45c529edf273658cdbe77a62a0e2",
"packagetype": "sdist",
"python_version": "source",
"requires_python": null,
"size": 30991,
"upload_time": "2012-08-26T19:14:19",
"url": "https://files.pythonhosted.org/packages/87/a6/46dd85b3a778cc882836a57c58b5474c0f9ba53c8f1fc71c07bd534883f6/sgp4-1.0.tar.gz"
}
],
"1.1": [
{
"comment_text": "",
"digests": {
"md5": "0ba35fa78bfe9d6f600d4a9a5571e03f",
"sha256": "86b800693a7ab7b0274f2bd5cbbbc2aef45b80464b81162af687f6b98042b505"
},
"downloads": -1,
"filename": "sgp4-1.1.tar.gz",
"has_sig": false,
"md5_digest": "0ba35fa78bfe9d6f600d4a9a5571e03f",
"packagetype": "sdist",
"python_version": "source",
"requires_python": null,
"size": 31992,
"upload_time": "2012-11-23T00:15:47",
"url": "https://files.pythonhosted.org/packages/ae/14/0d9eea414e35696182ad9c73d11e1dff3476f856b5f566ba6e7feb4c3e00/sgp4-1.1.tar.gz"
}
],
"1.3": [
{
"comment_text": "",
"digests": {
"md5": "5dbae5ded65224cdc19c6110e41d0a97",
"sha256": "eddf716ce89a346ba52cfbb81b0a67bb46cf25ad783bf16048bac16015a903d2"
},
"downloads": -1,
"filename": "sgp4-1.3.tar.gz",
"has_sig": false,
"md5_digest": "5dbae5ded65224cdc19c6110e41d0a97",
"packagetype": "sdist",
"python_version": "source",
"requires_python": null,
"size": 32569,
"upload_time": "2014-06-27T03:00:04",
"url": "https://files.pythonhosted.org/packages/f6/e7/310fbfbd5269c701342cc128ce13b81979bafed4e26cfb9fbcb840f036b6/sgp4-1.3.tar.gz"
}
],
"1.4": [
{
"comment_text": "",
"digests": {
"md5": "c4141d99e56b8a8bd2657e651481d08a",
"sha256": "1fb3cdbc11981a9ff34a032169f83c1f4a2877d1b6c295aed044e1d890b73892"
},
"downloads": -1,
"filename": "sgp4-1.4.tar.gz",
"has_sig": false,
"md5_digest": "c4141d99e56b8a8bd2657e651481d08a",
"packagetype": "sdist",
"python_version": "source",
"requires_python": null,
"size": 32386,
"upload_time": "2015-01-16T06:17:10",
"url": "https://files.pythonhosted.org/packages/d2/00/3f3699203176017211a71fe16e3fa71bae946ac92ade77d5a2ffc5da8576/sgp4-1.4.tar.gz"
}
]
},
"urls": [
{
"comment_text": "",
"digests": {
"md5": "c4141d99e56b8a8bd2657e651481d08a",
"sha256": "1fb3cdbc11981a9ff34a032169f83c1f4a2877d1b6c295aed044e1d890b73892"
},
"downloads": -1,
"filename": "sgp4-1.4.tar.gz",
"has_sig": false,
"md5_digest": "c4141d99e56b8a8bd2657e651481d08a",
"packagetype": "sdist",
"python_version": "source",
"requires_python": null,
"size": 32386,
"upload_time": "2015-01-16T06:17:10",
"url": "https://files.pythonhosted.org/packages/d2/00/3f3699203176017211a71fe16e3fa71bae946ac92ade77d5a2ffc5da8576/sgp4-1.4.tar.gz"
}
]
}