UARS MLS PARAMETER: SO2

UARS MONTH: 9202
UARS DAYS: 0157 - 0193 ( Feb. 15, 1992 - Mar. 22, 1992 )

• Inspection Date: 13-Jan-1997
  
  
• Quality Indicator for Month (QIM) [for v422 ] = A
  
  
• Further actions recommended: None.
  
  
• Comments: There was some moon interference (for space view calibration) on several records of UARS days 185 and 186 (and these records are flagged as bad). UARS day 188 is a partial day because of UARS being off.
  
  A non decaying residual 2 ppbv tropical SO2 is believed to be a systematic artifact of the measurement and retrieval system and not atmospheric.
  
  
• Number of records in each DQI and MMAF_STAT category
  • MMAF_STAT: G, good data; t, missing NCEP temperatures below 22 hPa; T, missing NCEP temperatures below 100 hPa; M, missing tangent points; P, pointing anomaly; S, scan anomaly; B, bad data.
  • DQI (Data Quality Indicator): 4, good radiance fit/good radiances; 3, good radiance fit/some bad radiances; 2, bad radiance fit/good radiances; 1, bad radiance fit/some bad radiances; 0, anomaly/no fit.
  
  

  Quality	MMAF STAT
  (ClO Band)	B	S	P	M	T	t	G
  4	0	0	4	2	0	0	48052
  3	0	0	0	0	0	0	0
  2	0	0	0	1	0	0	27
  1	679	0	0	0	0	0	0
  0	0	14	0	0	0	0	0

• Number of spikes
• These are spikes in the retrieved SO2 mixing ratios for records with MMAF_STAT = G/T/t and DQI = 4/2 (that is, good records with good radiances). Spikes are identified by comparison of their deviation from the monthly zonal mean with the rms variability (sigma) calculated in distinct 6 degree latitude bins.
  
• Total records this month with MMAF_STAT = G/T/t and DQI = 4: 48052
• Total records this month with MMAF_STAT = G/T/t and DQI = 4/2: 48079
• Total records with MMAF_STAT = G/T/t and DQI = 4 with at least one spike greater than 4 sigma: 25 (fraction = 5.20e-04 )
• Total records with MMAF_STAT = G/T/t and DQI = 4/2 with at least one spike greater than 4 sigma: 27 (fraction = 5.62e-04 )
• Total records with MMAF_STAT = G/T/t and DQI = 4 with at least one spike greater than 3 sigma: 629 (fraction = 1.31e-02 )
• Total records with MMAF_STAT = G/T/t and DQI = 4/2 with at least one spike greater than 3 sigma: 634 (fraction = 1.32e-02 )




P (hPa)	3 to 4 sigma	4 to 10 sigma	> 10 sigma	total
5	136	0	0	136
10	125	6	0	131
22	130	4	0	134
46	108	3	0	111
100	164	15	0	179



• Records with spikes > 4 sigma




Day	Record	MMAF STAT	DQI	Lat	Lon	P (hPa)	SO2 (ppbv)	UNCERT (ppbv)	sigma factor
163	582	G	4	34S	278	22	11.3	2.3	4.2
164	57	G	4	34S	60	46	15.5	4.2	4.2
164	424	G	4	5S	10	100	16.3	-8.6	4.7
164	1270	G	4	EQ	15	100	13.7	-8.5	4.0
166	309	G	4	9S	278	22,10	11.9, -11.1	2.9, 3.1	4.1, 5.2
168	1133	G	4	18S	140	100	17.9	-8.6	5.3
169	257	G	4	14S	23	10	9.7	2.1	4.4
169	1226	G	4	12S	116	100	16.2	-8.5	4.6
172	662	G	4	36N	122	10	9.2	2.1	4.6
174	501	G	4	1N	177	46	16.0	4.1	4.1
174	504	G	4	8S	183	100	19.4	-8.4	5.7
176	6	G	4	21S	49	46	16.2	4.2	4.2
177	599	G	4	8S	142	100	14.2	-8.5	4.1
178	291	G	4	25N	356	10	8.5	2.0	4.1
180	1103	G	4	76N	176	100	-15.2	-8.3	4.1
183	249	G	4	29N	185	100	-14.1	-8.4	4.3
184	876	G	4	EQ	24	100	19.2	-8.6	5.7
184	1149	G	4	24S	333	22	-7.0	2.1	4.1
186	649	G	4	12S	191	100	32.9	-8.7	9.5
187	20	G	4	34S	306	100	14.4	-8.4	4.4
187	515	G	4	52N	77	10	-8.8	2.0	4.2
187	518	G	2	41N	83	22	-16.8	2.4	8.6
189	637	G	2	31S	106	100	-15.9	-8.4	4.8
190	805	G	4	11S	22	100	17.9	-8.5	5.1
190	1098	G	4	11S	48	10	-9.2	2.0	4.3
191	807	G	4	9S	16	100	18.2	-8.5	5.2
191	808	G	4	12S	18	100	17.9	-8.4	5.1