Prognoz-7 satellites magnetometer observation database . The Prognoz-7 satellite was launched 30 October 1978 into orbit with perigee 500 and apogee 203000 km, orbital period was 98 hours. Magnetic field measurements were conducted by SG-70 magnetometer with working range +/- 60 nT., accuracy about 0.3 nT. and sampling rate 1 measurement per 10.24 sec. Magnetic measurements and satellite position data in GSE coordinate system are presented in separate ASCII files. ...