Brooks, i live in Germany abt. 500 km north of Franfurt/M and i run a M12+ in continuous duty in my GPSDO. Normally i do not keep track of the receiver's pps. However, on April 23 15:00 UTC i have started to record the phase relationship as measured inside my GPSDO. Will be glad to assist you and Ernie in pinpointing any anomalies. If Ernie detects one, give me a notice and i will look whether i can second source it.
Regards Ulrich [EMAIL PROTECTED] > -----Ursprüngliche Nachricht----- > Von: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Im Auftrag von Brooks Shera > Gesendet: Samstag, 22. April 2006 23:56 > An: Discussion of precise time and frequency measurement > Betreff: [time-nuts] M12+ phase jump due to WAAS/EGNOS DGPS > corrections? > > > I received the note below from Ernie Peres in Germany which > reports an effect consistent with an occasional phase jump in > the 1 PPS output from a M12+ rcvr, perhaps related to DGPS > corrections. The DGPS sats Ernie sees from his location are > part of the EGNOS system. > > The DGPS sats visible to me (sats #35,47 according to my > Garmin V) are part of the WAAS system and I haven't noticed > the phase jump effect with an M12+. > > I wouldn't really expect to since the M12+ is not > WAAS/EGNOS "enabled". > > However, something more subtle might be occurring. I wonder > if anyone else has noticed such an affect or has any ideas. > > Brooks > > > > ------------------note from Ernie---------------------------- > .....I am using a Motorola M12+ timing GPS eng board to > drive the W5OJM controller board and the high prec OCXO. I > have also bought a Garmin V handheld unit just for playing > around and noticed that it displays " new " sats.....ie nbr > 33 and 37. but the signal bar for this sats were gray instead > of black on the display. Later I learned that this new sats > are the AOR-E sat nbr 120 and the ARTEMIS sat nbr 124, and > also noticed that sat 33 is transmitting DGPS signals because the > GARMIN V / WAAS enabled / receiver displayed " D " > letters in the signal strength bar. Also the TAC32 program > displayed DGPS received and station ID "0000" age 0......... > > When I see this sats on the GARMIN receiver the same time > your GPS controlled board indicates a phase jump... I am > using DG4RBF software to plot EFC and phase error...... Did > you heard similar situation? > I do not know if this 2 sats are visible from the US but it > should be because the position from my home / Frankfurt/M, > Germany/ AOR-E EL... 28 deg. and > AZ.... 214 deg. the 37 sat ARTEMIS nbr 124 El...27 deg > AZ....164 deg. > > Also I have built other type of GPS controlled OCXO the so > called "analog" version where the JUPITER GPS eng board > 10kHz signal is PLL-ed the OCXO, and > also noticed on the EFC voltage a small variation.... > > Did any other person reported similar problem? > Based on the internet info this WAAS not yet fully > operational. It is just a testing procedures ???????? or > what is the future of this kind of OCXO locks? > Best regards, > > Ernie HG5ED > ------------------------end of > Ernie--------------------------- > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-> bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
