KBE3D / KBSatellite / _tlejs / getSecondTimeDerivative

函数: getSecondTimeDerivative()

getSecondTimeDerivative(tle: TLE, isTLEParsed?: boolean): number

Second Time Derivative of Mean Motion divided by six, measured in orbits per day per day per day (orbits/day ^ 3). Similar to the first time derivative, it measures rate of change in the Mean Motion Dot so software can make reasonable guesses when distant from the original TLE epoch. Normally zero unless the satellite is manuevering or has a decaying orbit. See https://en.wikipedia.org/wiki/Mean_Motion

and http://castor2.ca/03_Mechanics/03_TLE/Mean_Mot_Dot.html

Aka mean motion double dot.

参数

tle

TLE

Input TLE.

isTLEParsed?

boolean

Bypasses TLE parsing when true.

返回

number

示例

getSecondTimeDerivative('1 25544U 98067A   17206.18396726 ...');
0