[teqc] Query

Robert Khachikyan robertk at jpl.nasa.gov
Thu Oct 4 12:22:31 MDT 2018


My wishful thinking resulted in a typo for ITRF "18".

I should clarify that most JPL clocks and orbits are available in ITRF14.

Apologies for the confusion.

Regards,
--Robert


On 10/04/2018 10:19 AM, Robert Khachikyan wrote:
> Dear Javier,
>
> The JPL clocks and orbits are now mostly available for ITRF18. 
> However, this is data driven.
>
> What date range of your data you are PPP-ing?
>
> Regards,
> --Robert
>
>
> On 10/04/2018 09:37 AM, Javier Jovani Mendez Ramirez wrote:
>>
>> Good morning from
>>
>>
>> Engineers is that I have the following doubt and I ask the favor if 
>> you can explain me,
>>
>>
>> It turns out that by construction I like to send Rinex files of 
>> positioning that we do to two centers that provide a service called 
>> PPP - Precise Point Positioning. These centers are the natural 
>> resources office of Canada and the JPL laboratory of NASA.
>>
>>
>> I do this to compare the coordinates thrown by these centers with the 
>> coordinates that give me the adjustments using as a base, the 
>> stations of continuous operation of the IGAC
>>
>>
>> I did this because, from my analysis, the coordinates were 
>> "compatible", that is, they were all referred to the same reference 
>> system, ITRF08 measurement time
>>
>>
>> From a time here, when I send a rinex file to NASA, he reports me the 
>> coordinates in ITRF 08 measurement time, when I send them to the 
>> Canadian office he sends them to me in ITRF14 measurement time and 
>> when I download the certifications of IGAC's continuous operation 
>> stations are given in ITRF14.
>>
>>
>> The doubt that assails me is. What is the reference system that uses 
>> the GPS system by default? How do I change the reference system of 
>> the GPS system? Are the ITRF updates taken automatically by the GPS 
>> system?
>>
>>
>> I will be very grateful for the collaboration you can give me
>>
>>
>> Sincerely
>>
>>
>> Javier Méndez
>>
>> Bogota Colombia
>>
>>
>>
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>
>
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