#58 NOAA-15 APT transponder frequency incorrect

[robkilian]

The current APT transponder frequency for NOAA-15 is 137.620 MHz. I tried changing this value in /usr/share/gpredict/data/trsp/25338.trsp but it did not seem to change within gpredict no matter what I tried (closing & restarting; remove & re-adding sat to module, etc).

Version 1.3 on Linux.

[robkilian]

ETA: gpredict currently has the frequency listed as 137.500; correct frequency is 137.620

[Charles Suprin]

There may also be a transponder file in your .config/Gpredict directory.

I will check the master database when I have real connectivity. also if you can provide a reference it would be appreciated.

[robkilian]

That was it -- once I edited .config/Gpredict/trsp/25338.trsp to set the correct frequency the application immediately picked up upon the change.

[robkilian]

Here is a reference (the change was effective October 2010):

http://www.poes-weather.com/index.php?option=com_content&view=article&catid=1:latest-news&id=110&Itemid=50

[robkilian]

One more reference from NOAA:

http://www.oso.noaa.gov/poesstatus/spacecraftStatusSummary.asp?spacecraft=15

[robkilian]

Not sure if I should open a separate bug for this, but NOAA 17 is incorrect as well (currently 137.620; should be 137.500).

http://www.oso.noaa.gov/poesstatus/spacecraftStatusSummary.asp?spacecraft=17

[Charles Suprin]

I saw that noaa 16 has a bad hrpt frequency as well. I have fixes on my local copy. I will check in within a day.

Thanks for the information source and it is a bug.

[Alexandru Csete]

Well, if we call it a bug we will have to leave it open forever and check for each release because what is happening is that NOAA changes the frequencies every now and then.
Here is a recording from July last year, NOAA-15 on 137.5 MHz:
http://www.youtube.com/watch?v=y8Tb1_j3iQc

[Charles Suprin]

Corrections for NOAA-15 -16 and -17 have all been checked in as SVN 819.

[Alexandru Csete]

As of version 1.9 transponder data are fetched from https://db.satnogs.org/