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Time period of the data in the SO2 archive

Data for the Air Quality and the Volcanic SO2 Archive & Near-real time Services have been / are computed for the following time periods:

instrument
(satellite)

 time period of data
Archive service NRT service
SCIAMACHY
(ENVISAT)		 4 January 2004
-- 8 April 2012		 27 September 2006
-- 8 April 2012
OMI
(EOS-Aura)		 17 August 2004
-- Present		 8 November 2007
-- Present
GOME-2
(MetOp-A)		 4 January 2007
-- Present		 13 February 2008
-- Present
IASI
(MetOp-A)		 8 August 2008
-- Present		 27 August 2010
-- Present
AIRS
(Aqua)		 19 September 2010
-- Present		 19 September 2010
-- Present

 

Missing data in the SO2 and AAI data archive

The satellites carrying the instruments perform 14 or 15 orbits per day. It happens that for one or more of these orbits data is missing, either because the instrument did not measure anything, or because the measurement is of too low quality for a reliable retrieval. This missing data leads to gaps in the plots of the daily data. For some geographic regions of either of the two Services the web pages accessing the data archive will then show empty pictures.

There are also days with no data at all, again because of lack of measurements or lack of the quality of these measurements. For these days there will be no data in the archive at all, and the web pages accessing the data archive will show a message.

The following tables lists full(!) days without any data; these table is maintained by hand and may thus be incomplete.
 

SCIAMACHY
 
Year Month Days
2010 November
October
August
March
February
January 		01, 21
22-26, 30-31
14
04
01-02
29-31
2009 August
June
April
March
January 		10
04, 16
07-08
31
01-03
2008 December 19-31
2007 December
September 		02-04
25-27
2006 December
November
September
May
April
January 		13-15
29
08-10
26
06-08, 17-19
14
2005 May
January
 12
01-02
2004 December
November
October
September
June
May 		20-31
17
01
23
18-28
09
 
 
OMI
 
Year Month Days
2010 October
May
January 		23, 24
02
19
2009 August 05
 
 
GOME-2
 
Year Month Days
2010 February
January 		01
21-31
2009 December
November
September
April 		13-15
29
08-10
06-08, 17-19
2008 November
September
August
February
January 		29
08-11
15
17
28
2007 September
April
March 		19
09, 21-25
03-05
 
 
IASI
 
Year Month Days
2010 -- --
 
 
AIRS
 
Year Month Days
2010 -- --
 
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