Topic:
Local Oscillator switch causing data problems
Date/Time(UTC) Message Issued:
22 November 2002; 1400 UTC
Satellite(s) Involved:
NOAA-16
Instrument(s) Involved:
AMSU-A1
Product(s) Involved/Affected:
All data users
Date/Time(UTC) of Initial Implementation:
21 November 2002 1550 UTC
Details/Specifics of Change:
NOAA-16 AMSU-A1 channels 9 - 14 are showing a change in the calibrated
brightness temperatures due to the switch to the redundant oscillator on
November 21 at 1550Z. Soundings has discontinued distribution of their
product until this problem has been resolved. IPD is working with the
instrument scientist and SOCC to determine the best course of action (new
calibration data, switch back to primary oscillator, etc.). We will
correct this problem as soon as possible and will notify the users. We
apologize for the impact of this change to the users and thank you for your
patience as we resolve it.
Contact Person(s) Name/Email/Phone Number for Questions:
Emily.Harrod@noaa.gov/301-457-5247 ext. 117 or
Cecil.Paris@noaa.gov/301-457-5247 ext. 129
Web site(s) that contain other relevant information (where applicable):
http://www.oso.noaa.gov/daily-news/index.htm - SOCC morning reports
http://www.osdpd.noaa.gov/PSB/PPP/PPP.html - History of level 1B
notices
http://www.ssd.noaa.gov/PS/SATS/messages.html - All user notices