=============================================================================== Questionnaire concerning GLONASS biases: ---------------------------------------- Your institution: Contact email address(es): The GLONASS clock corrections you generate are consistent to: [X] pseudorange [X] carrier phase Please mark both fields if indicated. Clock corrections are generated at intervals of: 900 s (sp3 files) 30 s are not generated yet but could be. Handling of GLONASS interfrequency code biases (for ionosphere-free LC): [X] 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: one per arc (day) Description of datum definition (or reference) for GLONASS code biases: No static reference definition : We use a VERY LOOSE constrains on "the mean of all GLONASS code biases for sat n = 0" Latter, we re-align Glonass clocks with Broadcast one's with one bias per sat.... How many conditions/constraints are imposed for the bias datum definition? As many as the number of satellites then... 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? I copy here the Tim Springer answer as it is exactly the same ! "1) Firstly in our processing C2 is completely ignored. So observation existing of P1 and C2 or C1 and C2 are NEVER used. This holds both for GPS and GLONASS 2) Secondly P1 is preferred but if unavailable C1 is used. C1 observations are "converted" to P1 using the CC2NONCC tool. Not 100% sure how well/correct that works for GLONASS. For GPS it should be OK. " Do you generate GLONASS clock corrections on a regular/operational basis? [X] Yes Since week 1659 ! [ } No, but test results (in clock-RINEX) would be available for: Before week 1659 we did provide Glonass clocks but they were not usefull for combined PPP processing.... Recommendations for PPP users of your GLONASS clock product: Same as Tim Springer answer: "Use them, it really improves your solutions, especially kinematic solutions! Be sure to estimate an ISB for each rec-sat pair for the GLONASS observations." Do you have corresponding GLONASS bias results available (in ASCII form)? [ ] Yes [X] No Are there any specialties concerning your GLONASS clock product? Same as Tim.... Extra question: Do you have experience with GLONASS ambiguity resolution? [X] No Only few ideas.... [ ] Yes, please specify: