METHOD FOR MEASURING THE GRAVITATIONAL ACCELERATION OF A SPACE VEHICLE Russian patent published in 2022 - IPC G01S13/88 

FIELD: radio engineering.

SUBSTANCE: invention relates to the field of radio location and can be used to measure the gravitational acceleration of a space vehicle (SV). Substance: a drive signal of a known frequency is emitted from a ground transmitter and the Doppler shift of said frequency is measured on board of the SV. The difference of the Doppler frequencies of the drive signal over a known time interval is calculated. The required Doppler signal delay interval is therein calculated before starting receiving the signal of the ground transmitter along the entire route of the SV in the area of reception of the signal of the ground transmitter. The isolated Doppler frequency signal in digital form is sequentially delayed along the route of the SV for calculated delay time intervals by means of a variable digital delay line. The difference between the Doppler frequencies of forward and delayed Doppler signals is isolated for each delay interval. Current small differences between Doppler frequencies along the orbit are measured using a digital period meter. The current gravitational acceleration of the SV along the orbit is calculated for each current delay interval.

EFFECT: increase in the accuracy and discreteness of measurement of the gravitational acceleration on board of the SV.

1 cl, 1 dwg