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Questionnaire concerning of biases for undifferenced ambiguity resolution:
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Your name and institution:
Contact email address(es):

Primary reference/paper for your approach (URL address or email attached):
Not available.
We mainly followed the approach as written by Maorong Ge from GFZ.
        Resolution of GPS carrier-phase ambiguities in Precise Point
        Positioning (PPP) with daily observations
        M. Ge · G. Gendt · M. Rothacher · C. Shi · J. Liu


List of bias types considered and their temporal resolution:
Uncalibrated Phase Delays (UPDs) for the Widelane (based on MelWub) and Narrowlane

Clock corrections are generated at intervals of: 30 seconds


Ambiguity resolution for:
[X] undifferenced observations
[ ] between-satellite observations
[ ] other:


How do you select GPS code observable types (to be used for a specific
station)
if P1 and C1, or P2 and C2 are available?
1) C2 Never!! (at least not from RINEX 2.xx)
2) P1 otherwise C1, but C1 corrected to P1 using the CC2NONCC program and the P1C1 biases from CODE.

Do you generate integer phase clock corrections on a regular/operational
basis?
[ ] Yes
[X] No, but test results (in clock-RINEX) would be available for: Full repro2 timeframe (1995-2011)
Routine generation will start when new NAPEOS version (3.7) becomes operationally available


Recommendations for PPP users of your integer phase clock product: None at present.


Do you have corresponding bias results available (in ASCII form)?
[ ] Yes
[X] No, not at present but will be for the full repro2.

Are there any specialties concerning your integer phase clock product?
Our software currently does allow the corrections to be in the clocks or to be in a separate file (NLUPD). We have not decided/reviewed what the "best" approach is.

Extra question: Do you have experience/plans in extending your approach to
GLONASS observations?
[ ] No
[X] Yes, please specify: And also GALILEO (which may be easier :))

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