UARS MLS PARAMETER: CH3CN

UARS MONTH: 9201
UARS DAYS: 0126 - 0155 ( 15 Jan 1992 - 13 Feb 1992 )

• File Creation Date: 29-Oct-2001         Spikecatcher revision date: 18-Oct-2001
  
  
• Quality Indicator for Month (QIM) [for v500 . dat_1 ] = A
  
  
• Further actions recommended: None.
  
  
• Comments: None
  
  
• 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	0	0	1598	525	36713
  3	0	0	0	0	0	0	7
  2	0	0	0	0	24	18	664
  1	0	0	0	1	0	0	0
  0	0	0	0	0	0	0	0

• Number of spikes
• These are spikes in the retrieved CH3CN 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: 38836
• Total records this month with MMAF_STAT = G/T/t and DQI = 4/2: 39542
• Total records with MMAF_STAT = G/T/t and DQI = 4 with at least one spike greater than 5.0 sigma: 1 (fraction = 2.57e-05 )
• Total records with MMAF_STAT = G/T/t and DQI = 4/2 with at least one spike greater than 5.0 sigma: 10 (fraction = 2.53e-04 )
• Total records with MMAF_STAT = G/T/t and DQI = 4 with at least one spike greater than 4.0 sigma: 41 (fraction = 1.06e-03 )
• Total records with MMAF_STAT = G/T/t and DQI = 4/2 with at least one spike greater than 4.0 sigma: 63 (fraction = 1.59e-03 )




P (hPa)	4.0 to 5.0 sigma	5.0 to 10 sigma	> 10 sigma	total
0.147	3	0	0	3
0.215	2	0	0	2
0.316	3	0	0	3
0.464	5	0	0	5
0.681	0	0	0	0
1.00	2	0	0	2
1.47	3	0	0	3
2.15	3	0	0	3
3.16	2	0	0	2
4.64	1	0	0	1
6.81	4	1	0	5
10	2	2	0	4
15	3	0	1	4
22	1	0	0	1
32	4	0	1	5
46	5	0	1	6
68	15	8	0	23
100	6	2	0	8



• Records with spikes > 5.0 sigma




Day	Record	MMAF STAT	DQI	Lat	Lon	P (hPa)	CH3CN (pptv)	UNCERT (pptv)	sigma factor
126	13	G	2	4N	134	68, 46, 32, 15, 10	354.8,******,1375.5,-373.7, 278.5	58.7, 43.6, 40.8, 47.8, 57.2	8.8, 29.5, 29.9, 11.6, 5.6
127	311	G	4	75S	221	10	243.7	55.6	5.2
132	912	G	2	1N	218	68	-162.2	58.9	5.2
139	1242	G	2	20S	315	68	-187.0	53.3	6.0
142	22	G	2	5S	287	100, 68	361.4,-195.5	72.9, 53.0	5.2, 5.7
145	1172	G	2	12S	309	68	-161.1	52.6	5.3
149	1186	G	2	3S	291	68	-173.3	52.8	5.4
149	1272	G	2	10S	263	6.81	313.0	59.5	5.5
150	392	G	2	17S	137	68	-212.0	51.6	6.7
151	749	G	2	8S	38	100, 68	403.3,-176.2	76.7, 53.4	5.9, 5.2