Talk:List of GLONASS satellites

GLONASS retirement dates

@JFG: The authoritative source is glonass-iac.ru. They have an archive at ftp://ftp.glonass-iac.ru/MCC/STATUS/ from 2005 till the current time. Daily constellation status files like this ftp://ftp.glonass-iac.ru/MCC/STATUS/2006/Const_060405.glo contain "Выведен dd.mm.yy" ("Removed dd.mm.yy") next to the satellites to indicate first non-service day. Some of the removed could be brought back. It appears removal from the status file is the final abandonment. I have found another source that lists dates starting from the very beginning]. Let see how they list for example sat #788:

• glonass-iac.ru: 14 Dec 2005 first non-service day
• unibe.ch: 24 Dec 2005 last service day
• glonass-iac.ru: removes #788 from the status file on 6 Apr 2006
• glonass-svoevp.ru: lists 6 Apr 2006 in the "date of ceasing of action" column

So it appears that glonass-svoevp.ru is a good easy to read source of EOL dates. glonass-iac.ru is the offical but incomplete source of last service days that's hard to extract info from. unibe.ch appears to be ignoring when GLONASS system marks a satellite as removed and considers something else to be the end of service. unibe.ch also has some really erroneous entries like #775: 1996-2010 life span while glonass-iac.ru doesn't list it as of Jan 1st 2005 and glonass-svoevp.ru lists Aug 14th 2000 EOL date. I'm pretty sure #775 didn't last 14 years. More recent entries in unibe.ch list appears to be good. I spot checked #746, #724, #728 they match glonass-iac.ru exactly. EOL dates in glonass-svoevp.ru are 1-8 days behind the last service days for these sats.

I think the easiest way to improve the article is to put a disclaimer to the retirement column saying that it contains either first non-service day and total abandonment date due to the difficulty of extracting the info. — Sbsail ^talk 04:17, 30 October 2018 (UTC)

Found another good source of information. Detailed info on the first 28 launches on page 24. — Preceding unsigned comment added by Sbsail (talk • contribs) 03:33, 15 February 2019 (UTC)

References

Orbital slot number to spacecraft serial number history

This section is for the purpose of making it possible to determine the orbital slot number associated with a spacecraft serial number at a particular epoch. For example, GLONASS-M #727 had been assigned to slot 3 and 4 at different times of its lifespan, whereas slot 23 had been assigned to GLONASS #761/793 and GLONASS-M #714/732 at different epochs. This information can be found in the IGS ANTEX file, which uses the convention "RNN" and "RNNN" for orbital slot numbers and spacecraft serial numbers, respectively. For example, GLONASS-M #727 is described as:

GLONASS-M           R03                 R727      2008-067A TYPE / SERIAL NO    
  2008    12    25     0     0    0.0000000                 VALID FROM          
  2010     9    30    23    59   59.9999999                 VALID UNTIL         
GLONASS-M           R03                 R727      2008-067A TYPE / SERIAL NO   
  2010    12    16     0     0    0.0000000                 VALID FROM          
  2011     3    10    23    59   59.9999999                 VALID UNTIL         
GLONASS-M           R04                 R727      2008-067A TYPE / SERIAL NO    
  2010    10     1     0     0    0.0000000                 VALID FROM          
  2010    12    15    23    59   59.9999999                 VALID UNTIL             

whereas for slot 23 the following excerpt is relevant:

GLONASS             R23                 R761      1994-021B TYPE / SERIAL NO    
  1994     4    11     0     0    0.0000000                 VALID FROM          
  2002    12    24    23    59   59.9999999                 VALID UNTIL         
GLONASS             R23                 R793      2002-060B TYPE / SERIAL NO    
  2002    12    25     0     0    0.0000000                 VALID FROM          
  2006     2    27    23    59   59.9999999                 VALID UNTIL         
GLONASS-M           R23                 R714      2005-050A TYPE / SERIAL NO    
  2006     2    28     0     0    0.0000000                 VALID FROM          
  2010     3    18    23    59   59.9999999                 VALID UNTIL         
GLONASS-M           R23                 R732      2010-007C TYPE / SERIAL NO    
  2010     3    19     0     0    0.0000000                 VALID FROM          

A table extracted out of the ANTEX file is available from the Bernese GNSS Software site. — Preceding unsigned comment added by Sbsail (talk • contribs) 05:45, 7 November 2018 (UTC)

References