NOAA Office of Satellite and Product Operations

NOAA 15 COMM Subsystem Summary

Component Description Status
BTX 1 Beacon Transmitter #1 (137.35MHz) Green
BTX 2 Beacon Transmitter #2 (137.77MHz) Green
STX1 S-Band Transmitter #1 (1698MHz) Yellow
STX2 S-Band Transmitter #2 (1702.5MHz) Orange
STX3 S-Band Transmitter #3 (1707MHz) Red
STX4 S-Band Transmitter #4 (2247.5MHz) Green
VTX1 VHF Transmitter #1 (137.50MHz) Green
VTX2 VHF Transmitter #2 (137.62MHz) Green

Subsystem History:

Date Time Component Description
10/12/2010 15:49:41 VTX1 Turns off VTX1
10/12/2010 15:49:41 VTX2 Turns on VTX2. VTX2 became prime
08/01/2010 20:46:51 STX2 STX2 (HRPT transmitter) experienced an abrupt 4.71 W drop in output power. STX2 currently has an output power of ~1.25 W and its average orbital maximum temperature is ~26 deg. C.
11/29/2009 10:45:13 STX4 Turned off STX4 after McMurdo call-up pass for close approach.
11/29/2009 10:45:13 STX4 STX4 turned on for McMurdo call-up pass.
06/20/2007 16:49:30 VTX1 Turn VTX1 on.
06/19/2007 00:00:00 VTX1 Turn onVTX1, due to conflict with NOAA-12 ending.
05/17/2007 00:00:00 VTX1 Turn off VTX1, due to conflict with NOAA-12.
02/27/2007 20:00:00 VTX1 Turn on VTX1. Conflict with NOAA-12 ended
02/27/2007 20:00:00 VTX1 Turn on VTX1.
01/26/2007 13:52:00 VTX1 Turn off VTX1, due to conflict with NOAA-12.
01/25/2007 13:00:00 VTX1 Turn off VTX1.
01/25/2007 13:00:00 VTX1 Turn off VTX1, due to conflict with NOAA-12.
11/13/2006 21:50:00 VTX1 Turn on VTX1 (APT data) RF conflict with N12 over.
10/07/2006 04:00:00 VTX1 Turn off VTX1, due to conflict with NOAA-12.
07/31/2006 12:00:00 STX1 STX-1 (an unused transmitter) was declared yellow because of its tendency to interfere with AMSU-B data.
06/18/2006 21:00:00 VTX1 Turn off VTX1 due to conflict with N12.
04/02/2006 23:00:00 VTX1 Turn on VTX1 Conflict with NOAA 12 over.
03/01/2006 18:00:00 VTX1 Turn off VTX1 due to RF conflict with N12.
12/16/2005 18:35:00 VTX1 Conflict with N12 ended. Turn on VTX1 (APT data).
11/13/2005 19:00:00 VTX1 Turnoff VTX1 due to conflict with N12. No N15 APT until conflict period is over.
08/30/2005 07:30:00 VTX1 VTX-1 turn on (Conflict with N12 over). N15 APT data flow resumes.
07/29/2005 14:00:00 VTX1 Turn OFF VTX-1 (APT data) because of RF conflict with N12
05/27/2005 18:25:00 STX2 On 27 May at 18:25z the STX2 Omni (HRPT) transmitter experienced an abrupt drop in output power from its nominal value of 7.5 watts down to 3.3 watts. Several minutes later the power increased to 5.5 watts where it remains. No obvious effect on HRPT imagery at SOCC.
05/16/2005 18:15:00 VTX1 VTX1 turnon conflict with N12 over.
04/15/2005 19:58:00 VTX1 VTX1 turnoff (conflict with N12)
02/01/2005 15:00:00 VTX1 Turn VTX-1 (APT data) back on. Conflict with N12 over.
01/01/2005 14:51:00 VTX1 VTX1 Off due to conflict with NOAA 12. No APT on NOAA 15 during conflict period.
10/20/2004 17:05:00 VTX1 Turnon VTX-1 (APT data). RF conflict with N12 ended.
09/19/2004 22:00:00 VTX1 Turnoff VTX-1 (APT data) for duration of RF conflict with N12 (through 20 Oct)
07/08/2004 12:00:00 VTX1 RF Conflict with N12 ends. TurnON VTX-1 (APT data)
07/07/2004 23:30:00 VTX1 RF Conflict with N12 ended. VTX-1 (APT data) turned back on.
06/07/2004 12:00:00 VTX1 Turnoff VTX-1 (APT data) because of RF conflict with N12
06/07/2004 12:00:00 VTX1 Turn VTX-1 OFF (APT data) because of RF conflict with N12.
03/24/2004 13:05:00 VTX1 VHF (VTX-1) APT turn back on. Conflict with N12 ends.
02/21/2004 00:01:00 VTX1 VHF (VTX-1) APT data turnoff, conflict with N12 VTX.
01/16/2003 15:30:00 VTX1 Turn on VTX1, ending conflict with NOAA-12.
11/03/1998 00:00:00 STX1 Turned off to eliminate AMSU-B interference
06/17/1998 00:00:00 VTX2 VRA boom deployed
06/17/1998 00:00:00 VTX1 VRA boom deployed
06/01/1998 00:00:00 STX2 Switched to omni-directional mode
05/31/1998 00:00:00 STX2 Transmitter noisy - 0.5W increase in output power
05/13/1998 16:36:00 VTX1 VRA boom not fully deployed following launch
05/13/1998 16:36:00 STX3 Unit taken out of service. Data unreliable because of intereference with AMSU-B
05/13/1998 16:36:00 VTX2 VRA boom not fully deployed following launch
05/13/1998 16:24:00 VTX2 On Orbit
05/13/1998 16:24:00 VTX1 On Orbit
05/13/1998 16:24:00 BTX 2 On Orbit
05/13/1998 16:24:00 BTX 1 On Orbit
05/13/1998 16:24:00 STX4 On Orbit
05/13/1998 16:24:00 STX3 On Orbit
05/13/1998 16:24:00 STX2 On Orbit
05/13/1998 16:24:00 STX1 On Orbit
12/30/1994 10:36:00 VTX1 On Orbit