id summary reporter owner description type status priority component version resolution keywords cc 27 hints with respect to RINEX 3.02 default header stuerze stuerze "message from fgnievinski@gmail.com: There are a few issues when saving RINEX observation files, though. (a) Two mandatory header lines are missing (RINEX version 3.02): ""GLONASS SLOT / FRQ #"" ""GLONASS COD/PHS/BIS"" (b) The default skeleton includes observation codes that could benefit from some improvement, as follows: (b.1) C5, D5, L5, S5 are invalid, as they lack the third character, denoting the attribute (tracking mode or channel); most commonly it's ""X"", thus C5X, D5X, L5X, S5X. (b.2) The modernized GPS L2 signal (""L2C"") is being reported under observation codes C2C, D2C, L2C, S2C. Actually, the ""C"" attribute is reserved for the C/A signal (as in C1C, D1C, L1C, S1C), whose transmission in the L2 band remains a technical possibility (according to Table 3-III, ""Signal Configuration"", of the GPS ICD), even in pre-modernized or legacy GPS satellites, although as far as I know it is very rare. The L2C signal normally is reported under C2X, D2X, L2X, S2X. (b.3) The legacy GPS L2 signal (""L2-P(Y)"") is being reported under observation codes C2P, D2P, L2P, S2P. This is only true when anti-spoofing is disabled, which again is very rare. Under encrypted broadcast, observation codes C2W, D2W, L2W, S2W are employed for civilians (and C2Y, D2Y, L2Y, S2Y for military receivers). (b.4) In summary, may I suggest the following new default GPS observation codes: G 20 C1C L1C D1C S1C C1W L1W D1W S1W C2X L2X D2X S2X C2W SYS / # / OBS TYPES L2W D2W S2W C5X D5X L5X S5X SYS / # / OBS TYPES These correspond to the majority of stations, see, e.g.: " enhancement closed normal BNC fixed RINEX observations stuerze fgnievinski@…