To: IGS-BCWG, IGS-ACS
Subject: Questionnaire concerning GLONASS biases


Dear colleagues,

Harmonization of handling of GLONASS (interfrequency) code biases and promotion
of an IGS-combined GLONASS clock product is one of the declared goals for the
planned Workshop on GNSS Biases (www.biasws2012.unibe.ch).

For this, we ask all IGS ACs and other involved institutions generating precise
clock corrections for GLONASS to provide us with the following information by
18 Dec 2011 (to: biasws2012.aiub@lists.unibe.ch).

Thanks in advance.

Best regards,

Stefan Schaer, Michael Meindl


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Questionnaire concerning GLONASS biases:
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Your institution:
Contact email address(es):

The GLONASS clock corrections you generate are consistent to:
[ ] pseudorange
[ ] carrier phase
Please mark both fields if indicated.

Clock corrections are generated at intervals of:


Handling of GLONASS interfrequency code biases (for ionosphere-free LC):
[ ] one bias parameter for each station and satellite combination/pair
[ ] one bias parameter for each station and frequency channel combination/pair
[ ] other configuration:
Time resolution:


Description of datum definition (or reference) for GLONASS code biases:


How many conditions/constraints are imposed for the bias datum definition?


How do you select GLONASS code observable types (to be used for a specific
station) if P1 and C1, or P2 and C2 are available?


Do you generate GLONASS clock corrections on a regular/operational basis?
[ ] Yes
[ } No, but test results (in clock-RINEX) would be available for:


Recommendations for PPP users of your GLONASS clock product:


Do you have corresponding GLONASS bias results available (in ASCII form)?
[ ] Yes
[ ] No

Are there any specialties concerning your GLONASS clock product?


Extra question: Do you have experience with GLONASS ambiguity resolution?
[ ] No
[ ] Yes, please specify:

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