[teqc] question on rinex file formatting...

Sridhar Anandakrishnan sak at essc.psu.edu
Thu Sep 3 04:51:19 MDT 2009


jeff, lou, thanks for the quick response.  That makes sense.
Sincerely
Sridhar.

BTW, Lou, I meant that I used the trimble utility to convert from T00  
to DAT, and then the UNAVCO teqc to convert to RINEX.
Cheers,
Sridhar.
On Sep 2, 2009, at 11:46 PM, Jeff Freymueller wrote:

> Sridhar,
>
> I think that is right. The Net-RS does not really observe P1. It  
> observes C1 and P2-P1 (it's P2 is really C1 + (P2-P1)).
>
> The P1 observable is normally restricted to those receivers that  
> observe P1 directly, like the Ashtech Z-12 and any receivers that  
> use similar methods.
>
> I think the usual software packages expect this. If there is a  
> problem, use teqc to remove P1. Becuase the P1 will all be blank  
> anyway, you won't lose anything.
>
> Jeff
>
> On Sep 2, 2009, at 7:31 PM, Sridhar Anandakrishnan wrote:
>
>> All, I must be missing something.  Here is the output of ``teqc -tr  
>> d FILE.DAT > file.obs''
>>
>> This is a Trimble NetRS file converted to .DAT with the Trimble  
>> utility.
>>
>> Here's my question:  The # / TYPES OF OBSERV lines is 7, L1, L2,  
>> C1, P2, P1, S1, and S2
>> but the observations are only 6 numbers.  Is one of the obs null?   
>> Would that be P1?
>>
>> -2012390.71947  -1554465.15246  22369201.6564   22369193.6644
>>       47.7504         36.0004
>>
>> Thanks,
>> Sridhar
>>
>>    2.11           OBSERVATION DATA    G (GPS)             RINEX  
>> VERSION / TYPE
>> teqc  2009Mar23                         20090903 03:23:42UTCPGM /  
>> RUN BY / DATE
>> OSX ker:9.6.0|G5|gcc 3.3|OSX ker:9.6.0+|G3+                 COMMENT
>> BIT 2 OF LLI FLAGS DATA COLLECTED UNDER A/S CONDITION       COMMENT
>> CREF0001                                                    MARKER  
>> NAME
>> 0001                                                        MARKER  
>> NUMBER
>> -Unknown-           -Unknown-                                
>> OBSERVER / AGENCY
>> 4435237649          TRIMBLE NETRS       1.1-2               REC # /  
>> TYPE / VERS
>> 00000000            TRM41249.00                             ANT # /  
>> TYPE
>> 1506677.2614 -1764342.7580  5922323.4166                  APPROX  
>> POSITION XYZ
>>       0.0533        0.0000        0.0000                  ANTENNA:  
>> DELTA H/E/N
>>    1     1                                                 
>> WAVELENGTH FACT L1/2
>>    7    L1    L2    C1    P2    P1    S1    S2            # / TYPES  
>> OF OBSERV
>>   15                                                      LEAP  
>> SECONDS
>> SNR is mapped to RINEX snr flag value [0-9]                COMMENT
>> L1 & L2: min(max(int(snr_dBHz/6), 0), 9)                  COMMENT
>> 2009     6    17     0     0    0.0000000     GPS         TIME OF  
>> FIRST OBS
>>                                                           END OF  
>> HEADER
>> 09  6 17  0  0  0.0000000  0 12G25G 8G 6G15G 3G18G16G21G22G28G19G 7
>> -2012390.71947  -1554465.15246  22369201.6564   22369193.6644
>>       47.7504         36.0004
>> -13159696.77047 -10241289.26646  21994332.7814   21994325.5514
>>       47.5004         36.5004
>> _______________________________________________
>> teqc mailing list
>> teqc at ls.unavco.org
>> http://ls.unavco.org/mailman/listinfo/teqc
>
>
>
> Dr. Jeffrey T. Freymueller         Office: 907-474-7286
> Geophysical Institute              Fax:    907-474-7290
> University of Alaska, Fairbanks    Home:   907-479-3550
> PO Box 757320                      Cell:   907-378-7556
> Fairbanks, AK 99775-7320           email: jeff.freymueller at gi.alaska.edu
> URL: http://www.gps.alaska.edu/jeff/jeff.html
>
> Download Alaska GPS data: ftp://gps.alaska.edu/pub/gpsdata/
>
>


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