From C.Garcia Fri Mar 4 06:18:25 1994 From: C.Garcia (C.Garcia) Date: Fri, 4 Mar 1994 6:18:25 PST Subject: [IGSMAIL-0524] Perth TurboRogue status Message-ID: ****************************************************************************** IGS Electronic Mail Fri Mar 4 6:18:25 PST 1994 Message Number 0524 ****************************************************************************** Author: C.Garcia Subject: Perth TurboRogue status Subject: Perth TurboRogue status The TurboRogue at Perth has been reconnected to the external Caesium frequency reference after fixing some problems experienced by the Caesium. The following is a list of the major events in the last days: 25/02/94 New link implemented to retrieve data from the receiver. 25/02/94 8:00 A very high offset of the Caesium (several milisec.) affected the performances of the TurboRogue. The number of satellites locked was 4 in average. Constant messages of signal too low for the satellites in view but not tracked. 28/02/94 The receiver was depowered for external reasons between 2:30 and 9:00. In the meantime the frequency reference was changed to a Rubidium, but the problem persisted. 01/03/94 9:00 The receiver was connected to the internal oscillator, but its behavior was very irregular. It was impossible to enable properly the digital potenciometer which controls the clock steering. The receiver was working with a very high clock drift (around 4 microsec/sec). 03/03/94 9:00 The Caesium was repaired and reconnected to the receiver. Now the situation is nominal. C.Garcia ESA/ESOC(GMV)