Changelog

5.0.0 (2023-01-06)

Errors in calculations are fixed, WGS72 is used instead of WGS84 (#107).
Dependencies are upgraded.

4.1.4 (2022-07-18)

TypeScript definition for ecfToEci function is added.

4.1.3 (2020-12-18)

Fixed calculation of Doppler effect (dopplerFactor).

4.1.2 (2020-10-13)

Expose error in TypeScript definition of SatRec.
Fix TypeScript definition for PositionAndVelocity to allow error handling.

4.1.1 (2020-09-15)

Fix TypeScript definition for gstime (#73).
Fix documentation and TypeScript definition for degreesLong and degreesLat (#74).

4.1.0 (2020-09-14)

TypeScript support is added via new TypeScript definitions file (#71).
Rollup and some other dependencies are upgraded.

4.0.0 (2020-01-21)

Node.js 12 support is added. Node.js 6 and Node.js 8 support is dropped (breaking change).
Mocha, Chai and Istanbul are replaced by Jest.
Dependencies are upgraded.

3.0.1 (2019-03-14)

Unnecessary calculations in sgp4 function are reduced (#47).
vkmpersec calculation is moved to constants (#50).
degreesToRadians function is used in docs instead of deg2rad constant (#53).
Typos' fixes (#54).

3.0.0 (2018-11-26)

Node.js 4 support is dropped (breaking change).
Deprecated functions gstimeFromJday and gstimeFromDate are removed (breaking change).
New transformation functions are added: radiansToDegrees, degreesToRadians, radiansLat, radiansLong.

2.0.3 (2018-09-15)

satrec object is not cloned in sgp4 and sgp4init functions due to performance reasons.

2.0.2 (2018-04-16)

Wrong predictions for Molniya 3-47 orbits are fixed. Special thanks to @nhamer.

2.0.1 (2018-03-01)

sgp4 function's call result is used in sgp4init.
Longitude of eciToGeodetic result is in [-PI; PI] range now.

2.0.0 (2017-12-23)

Library became ES and Common.js compatible.
Source code is reorganized to match original Python library.
degreesLat and degreesLong don't adjust input radians value and throw RangeError if it's out of bounds (breaking change).
invjday function is added.
Julian day calculations take account of milliseconds (#38).
Incorrect position and velocity bug for times not close to TLE epoch is fixed (#37).
Continuous integration and test coverage are provided.
Bower support is dropped.