How to use CODE's IAR analysis products for PPP-AR, or integer-PPP (IPPP)
 -------------------------------------------------------------------------

 Please use the CODE IGS products of a particular analysis line
 - eph     ... SP3c/SP3d orbit file,
 - erp     ... IERS ERP file,
 - clk     ... 30-sec Clock(-RINEX) corrections
 - clk_05s ...  5-sec Clock(-RINEX) corrections (available for the final product)
 in conjunction with
 - bia     ... the accompanying Bias-SINEX file from CODE.

 These daily bias files contain pseudo-absolute (OSB)
 - pseudorange and
 - phase bias values for the GPS/Galileo/QZSS constellation
 that are *consistent* with the associated ambiguity-fixed clock product and
 and thus has to be applied for *each* involved observation, specifically in
 the sense:

   O_measured = O_computed + B_satellite

 where O stands for Observation and B for Bias. Note that just satellite OSB
 (Observable-specific Signal Bias) corrections are relevant for PPP ambiguity
 resolution (PPP-AR) and integer-PPP (IPPP), respectively.

 Following this convention, you should get the integer nature of single-receiver
 (between-satellite) phase ambiguities automatically recovered for both
 - wide-lane (WL) ambiguities using the Melbourne-Wuebbena LC and
 - narrow-lane (NL) ambiguities using the ionosphere-free LC (when introducing
   the previously resolved WL integers).
 Note: NL ambiguity resolution may be performed in phase-only or in
       pseudorange-supported mode.
 CAUTION: It is critical whether (or not) satellite PCO corrections are
          applied for the Melbourne-Wuebbena LC. This is crucial especially
          for GPS Block IIIA satellites as well as for the complete Galileo
          constellation.
          - APPLIED: The above mentioned PCO correction is generally
            applied for products generated from day 331 of 2022 (start of
            GPS week 2238) or if indicated with the header record
            "*SATELLITE_ANTENNA_PCC_APPLIED_TO_MW_LC YES". The current
            phase bias values of CODE are conditioned accordingly and must
            therefore be considered in conjunction with a PCO correction
            also when processing the MW LC.
          - NOT APPLIED: Such a correction is not applied to the MW LC if
            this is declared with "*SATELLITE_ANTENNA_PCC_APPLIED_TO_MW_LC
            NO" or if no corresponding header record is specified. In such
            a case, users should not apply any PCO correction to the MW LC.
 Note: It is important that, as far as PCO corrections are applied, they
       correspond to the underlying IGS ANTEX model. The latest IGS ANTEX
       model used in CODE's operational analysis lines can be found at:
         http://ftp.aiub.unibe.ch/CODE/I20.ATX
         http://ftp.aiub.unibe.ch/BSWUSER54/REF/I20.ATX
 IMPORTANT NOTE: Please follow the "no phase bias no AR" rule.


 References
 ----------

 Dach, Rolf; Schaer, Stefan; Arnold, Daniel; Brockmann, Elmar; Kalarus,
 Maciej Sebastian; Lasser, Martin; Stebler, Pascal; Jäggi, Adrian
 (2024). CODE rapid product series for the IGS. Published by Astronomical
 Institute, University of Bern. URL:
 https://www.aiub.unibe.ch/download/CODE; DOI: 10.48350/197026.

 Dach, Rolf; Schaer, Stefan; Arnold, Daniel; Brockmann, Elmar; Kalarus,
 Maciej Sebastian; Lasser, Martin; Stebler, Pascal; Jäggi, Adrian
 (2024). CODE final product series for the IGS. Published by Astronomical
 Institute, University of Bern. URL:
 https://www.aiub.unibe.ch/download/CODE; DOI: 10.48350/197025.

 Dach, Rolf; Schaer, Stefan; Arnold, Daniel; Brockmann, Elmar; Kalarus,
 Maciej Sebastian; Lasser, Martin; Stebler, Pascal; Jäggi, Adrian
 (2024). CODE product series for the IGS MGEX project. Published by
 Astronomical Institute, University of Bern. URL:
 https://www.aiub.unibe.ch/download/CODE_MGEX; DOI: 10.48350/197028.

 Selmke, Inga; Dach, Rolf; Arnold, Daniel; Prange, Lars; Schaer, Stefan;
 Sidorov, Dmitry; Stebler, Pascal; Villiger, Arturo; Jäggi, Adrian;
 Hugentobler, Urs (2020). CODE repro3 product series for the IGS. Published
 by Astronomical Institute, University of Bern. URL:
 https://www.aiub.unibe.ch/download/REPRO_2020; DOI 10.7892/boris.135946.


 Villiger, A., S. Schaer, R. Dach, L. Prange, A. Susnik, A. Jäggi, 2019:
 Determination of GNSS pseudo-absolute code biases and their long-term
 combination. Journal of Geodesy (2019), Springer Berlin Heidelberg, first
 online 10 May 2019.
 DOI: 10.1007/s00190-019-01262-w

 Schaer, S., A. Villiger, D. Arnold, R. Dach, L. Prange, A. Jäggi, 2021:
 The CODE ambiguity-fixed clock and phase bias analysis products: generation,
 properties, and performance. Journal of Geodesy (2021), Springer Berlin
 Heidelberg, first online 28 June 2021.
 DOI: 10.1007/s00190-021-01521-9


 See also:
   http://ftp.aiub.unibe.ch/AIUB_AFTP.TXT

 This file can be found at:
   http://ftp.aiub.unibe.ch/CODE/IAR_README.TXT