BRIEF INSTRUCTION ----------------- Please use the CODE IGS final analysis products - eph ... sp3c orbit files, - erp ... weekly IERS ERP file, - clk ... 30-sec Clock(-RINEX) corrections, or - clk_05s ... 5-sec Clock(-RINEX) corrections as they may be downloaded, e.g., from CDDIS ftp://cddis.gsfc.nasa.gov/pub/gps/products/ or directly taken from ftp://ftp.aiub.unibe.ch/users/schaer/data/iar/ in conjunction with - bia ... the accompanying Bias-SINEX files from CODE (made available here exclusively for test purposes). These daily bias files contain - pseudorange and - phase bias values for the GPS constellation that are *consistent* with our ambiguity-fixed clock product and thus have to be applied for *each* involved observation, specifically in the sense: O_corrected = O_measured - 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. When following this, you should get the integer nature of single-receiver (between-satellite) phase ambiguities automatically recovered for both - wide-lane (WL) ambiguities using the Melbourne-Wuebbenna LC and - narrow-lane (NL) ambiguities using the ionosphere-free LC (and introducing the previously resolved WL integers). Note: NL ambiguity resolution may be performed in phase-only or in pseudorange-supported mode. Last but not least, please be aware that in addition - _24h.clk_05s.Z high-rate clock files that contain also the midnight (24:00:00) epoch (clock files that are not yet submitted to the IGS) are accessible in this test data set. Consequently, the clock and phase bias products of consecutive days may be consistently aligned using the 00:00:00 and 24:00:00 epoch satellite clock values (and their integer NL cycle property). That's all. Feedback and questions to: code(at)aiub.unibe.ch See also: http://www.igs.org/presents/workshop2018 http://www.igs.org/assets/pdf/IGSWS-2018-PY01-02.pdf http://www.igs.org/assets/pdf/IGSWS-2018-PS13-07.pdf http://www.bernese.unibe.ch/publist/publist_2018.php http://www.bernese.unibe.ch/publist/2018/pres/PY01_Schaer_IGSWS2018_pdf.pdf http://www.bernese.unibe.ch/publist/2018/post/IGSWS2018_LEOAR.pdf eph, erp, sum, clk files may be found at CDDIS: wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20260.eph.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20261.eph.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20262.eph.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20263.eph.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20264.eph.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20265.eph.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20266.eph.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20267.erp.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20267.sum.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20260.clk.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20261.clk.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20262.clk.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20263.clk.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20264.clk.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20265.clk.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20266.clk.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20260.clk_05s.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20261.clk_05s.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20262.clk_05s.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20263.clk_05s.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20264.clk_05s.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20265.clk_05s.Z wget ftp://cddis.gsfc.nasa.gov/pub/gps/products/2026/cod20266.clk_05s.Z