This directory contains reference documents.
- aoki1982new.pdf: Calculate GMST in radians given UT1 time
- astroalmanac2019sun.pdf: Scan of the Astronomical Almanac page for calculating the position vector of the Sun
- borkowski1989accurate.pdf: Converting from Cartesian ECI coordinates to latitude and longitude on an ellipsoid (as opposed to a sphere)
- dod2014wgs.pdf: 2014 update to WGS84 with important constants
- fliegel1968letters.pdf: An equation for converting from Gregorian date to Julian date (no proof provided unfortunately!); note that the equation only works if calculated using computer integer arithmetic truncation
- hoots1980models-original.pdf: Original scan of Spacetrack Report No. 3; useful for checking SGP4 implementations with the original software
- hoots1980models-searchable.pdf: A nicely formatted, searchable version of Spacetrack Report No. 3
- mccarthy2009time.pdf: Some useful information on time systems, including a concise check for whether a year is a leap year
- seppelin1974department.pdf: Scan of the WGS72 report; Spacetrack Report No. 3 was published before WGS84, so SGP4 uses older WGS72 constants
- vincenty1975direct.pdf: Closed-form formula for "great circle arc" distance on an ellipsoid (as opposed to a sphere)
- wertz1999space.pdf: The "SMAD" (Space Mission Analysis and Design) book; Chapter 13 has a great overview of communications and references several more detailed papers, documents, and reports
- README.md: This document
Written by Bradley Denby
Other contributors: None
See the top-level LICENSE file for the license.