[time-nuts] GPRS zero azimuth and elevation, most PRN displayed as not O/K,

Mark C. Stephens marks at non-stop.com.au
Wed Jun 26 16:13:15 UTC 2013


Hi Azelio, err...


E-113>:syst:stat?
[ Unlocked ] ------------------ GPSR 2 Status --------------------------------
SYNCHRONIZATION ........................... [ Outputs Valid/Reduced Accuracy ]
SmartClock Mode _________________________    Reference OutPuts _______________
   Locked to GPS                             TFOM     3          FFOM        3
   Recovery                                  1PPS TI  +0 ns
   Holdover                                  HOLD THR
>> Power-up: OCXO Warm-up                    Holdover Uncertainty_____________
                                             Predict

ACQUISITION ............................................... [ GPS 1PPS Valid ]
Tracking: 6       Not Tracking: 0            Time ____________________________
PRN  El  Az  C/N   PRN  El  Az               LOCL GPS 02:10:05     27 Jun 2013
  7    0   0   39                            GPS 1PPS  Synchronized to GPS
  8    0   0   50                            ANT DLY      28 ns
  9    0   0   52                            Position ________________________
 15    0   0   44                            MODE     Survey:   1.3% complete
 17    0   0   49
 24    0   0   39                            AVG LAT  S  33:45:49.689
                                             AVG LON  E 151:05:31.705
                                             AVG HGT          +131.66 m  (MSL)
ELEV MASK 10 deg
HEALTH MONITOR ........................................................ [ OK ]
Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
Alarms:    (none)




They are all zero now!
I have just changed eman to 10 and rebooted.
I guess it must be something to do with almanac, 
perhaps being patient and waiting a day or 3 may yield a change.
Hopefully for the better.


marki

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Azelio Boriani
Sent: Wednesday, 26 June 2013 7:09 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPRS zero azimuth and elevation, most PRN displayed as not O/K, 

Try to put the elevation mask to 10degrees, not 25 :GPS:SAT:TRAC:EMAN 10

On Tue, Jun 25, 2013 at 8:41 AM, Mark C. Stephens <marks at non-stop.com.au> wrote:
> I have a GPSR2 with unusual; GPS behaviour.
>
> E-113>:syst:stat?
> [ Active ] -------------------- GPSR 2 Status 
> -------------------------------- SYNCHRONIZATION ........................... [ Outputs Valid/Reduced Accuracy ]
> SmartClock Mode _________________________    Reference OutPuts _______________
>>> Locked to GPS                             TFOM     3          FFOM        0
>    Recovery                                  1PPS TI  +0 ns
>    Holdover                                  HOLD THR
>    Power-up                                  Holdover Uncertainty_____________
>                                              Predict
>
> ACQUISITION ............................................... [ GPS 1PPS Valid ]
> Tracking: 5       Not Tracking: 7            Time ____________________________
> PRN  El  Az  C/N   PRN  El  Az               GPS      06:37:39     25 Jun 2013
>   1    0   0   49    3  Not OK               GPS 1PPS  Synchronized to GPS
> 11    0   0   47    6  Not OK               ANT DLY      28 ns
> 14   25 349   43   15  Not OK               Position ________________________
> 31    0   0   49   18  Not OK               MODE     Hold
> 32    0   0   47   21  Not OK
>                     22  Not OK               LAT      S  33:45:49.374
>                     27  Not OK               LOG      E 151:05:31.495
>                                              HGT              +118.61 m  (MSL)
> ELEV MASK 25 deg
> HEALTH MONITOR ........................................................ [ OK ]
> Self Test: OK   Int Pwr: OK   Oven Pwr: OK   OCXO: OK   EFC: OK   GPS Rcv: OK
> Alarms:    (none)
>
>
> As you can see the Azimuth and elevation are zero.
>
> Group opinion please, bad antenna connector or bad GPS module?
>
>
> -marki
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