[teqc] FCN of Glonass R17 satellite

Lou Estey lou at unavco.org
Wed Jan 23 13:05:20 MST 2008


Using a couple of MDB files supplied by Giovanni, I'm pretty sure I have
this fixed for both Leica MDB and Topcon TPS/Javad JPS formats.  (Giovanni's
TPS file appeared to have other problems, i.e. most records had checksum
errors suggesting it had been collected or transferred incorrectly.)

--lou

Giovanni.Sella wrote:
> Dear Lou,
>  I too see the same problem with LEICA MDB format.
> With TPS data
> I get different message.
>  ! Warning ! Topcon TPS with possible non-standard message starting 
> with  [-]
>  ! Warning ! Topcon TPS corrupted data or mis-partsing by teqc
> 
> The TOPCON is from a TPSG3_A1 with firmware 3.2
>  I only have receivers with firmware 3.2 so I cannot see if this is a 
> new or earlier error message.
> 
> Giovanni
> 
> 
> Lou Estey wrote:
>> Uwe,
>>
>> You'll have to send me a sample file or two so I can look at them.  Send
>> the files to me, not the teqc list.  If this is occurring with both Javad
>> JPS and Leica data (MDB format?), I'd need a sample of both.
>>
>> --lou
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Louis H. Estey, Ph.D.              office:  [+001] 303-381-7456
>> UNAVCO, 6350 Nautilus Drive           FAX:  [+001] 303-381-7451
>> Boulder, CO  80301-5554            e-mail:  lou  unavco.org
>>    WWW:  http://www.unavco.org   http://jules.unavco.org
>>
>> "If the universe is the answer, what is the question?"
>>                                                -- Leon Lederman
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>>> we use teqc for converting javad and leica raw data files to rinex.
>>>
>>> Since glonass satellite R17 is up, we see in the glonass navigation 
>>> file no R17 navigation messages due to the fact that teqc rejects all 
>>> navigation messages with fcn (frequency channel number) out of the 
>>> range of -7 to +24:
>>>
>>> ! Notice ! GLONASS: bad frequency #= 255 being rejected  (min= -7, 
>>> max= 24)
>>> ! Notice ! GLONASS: bad frequency #= 254 being rejected  (min= -7, 
>>> max= 24)
>>>
>>> When we use for example jps2rin, for R17 a fcn of 255 is reported, 
>>> but is included in the navigation file.
>>>
>>> We have this effect with all data collecting software(s) we use for 
>>> javad and also with raw mdb files directly downloaded from the leica 
>>> receiver.
>>>
>>> We are now not sure, whether it is a problem related to teqc or the 
>>> raw data format of the receivers.
>>>
>>> The newest teqc is used:
>>>      2.10           G: GLONASS NAV DATA                     RINEX 
>>> VERSION / TYPE
>>> teqc  2007Jun25     root                20080123 00:24:06UTCPGM / RUN 
>>> BY / DATE
>>> Linux 2.4.20-8|Pentium IV|gcc|Linux|486/DX+                 COMMENT
>>> teqc  2007Jun25     root                20080122 01:00:00UTCCOMMENT
>>>   2008     1    22    1.201871782541D-06                    CORR TO 
>>> SYSTEM TIME
>>>     14                                                      LEAP SECONDS
>>>                                                             END OF 
>>> HEADER
>>>
>>> Thanks.


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