Dataset Format Description

NAVY MCSST Temporary Observation File (effective 12/01/2015)

This file is a sequential data set with fixed-length data records. The data record length is 104 bytes.

Following normal convention, the first (most significant) bit in the byte sequence for each value is the sign bit (0-positive, 1-negative).

Below are the contents of each data record in this file.

BYTE(S)	VALUE	UNITS	NOTE
1-8	Spares	=0
9	Type of SST observation/retrieval	Numeric	See local BUFR code table 0-06-193. (Currently see values of 151, 152, 159.)
10	SST observation source	Numeric	See local BUFR code table 0-06-194.
11	2-digit year	Numeric	Range is 00 to 99.
12	Month of year	Numeric	Range is 1 to 12.
13-14	Latitude	degrees*100 (N+, S-)	Range is -9000 to 9000.
15-16	Longitude	degrees*100 (E+, W-)	Range is -18000 to 17999.
17	Day of month	Numeric	Range is 1 to 31.
18	Hour (UTC)	Numeric	Range is 0 to 23.
19	Minute	Numeric	Range is 0 to 59.
20	Second	Numeric	Range is 0 to 59.
21-22	SST	deg C*10	Range is -20 to 350. A value of -3000 means the data is missing.
23-24	Standard deviation of SST retrieval	deg C*100	Range is 0 to 32767 although values should usually not be much above 150.
25-26	Solar zenith angle	degrees*10	Range is 0 to 1800.
27-28	Satellite zenith angle	degrees*100	Range is -600 to 600. A value of -3000 means the data is missing.
29-30	Analyzed Field SST	deg C*10	Range is -20 to 350. A value of -3000 means the data is missing.
31-32	Bias in SST retrieval	deg C*100	Range is -150 to 150.
33-34	Solar azimuth angle	degrees*10	Range is 0 to 1800. A value of -3000 means the data is missing.
35-36	Climatological SST	deg C*10	Range is -20 to 350. A value of -3000 means the data is missing.
37	Reliability classification	Numeric	Values are either 1 (clear), 2 (probably clear) or 3(questionable). See this link for more information.
38	Proximity confidence value	Numeric	Values are “6 minus the reliability classification (byte 37) plus 100”. This is either 105 (clear), 104  (probably cear) or 103 (questionable) . See this link for more information.
39-40
METOP and NOAA	AVHRR Channel 1 albedo	percent*100	Range is 0 to 10000.
S-NPP	VIIRS M-Band channel 5 brightness temperature	K*100	Range is 0 to 32767.
41-42
METOP and NOAA	AVHRR Channel 2 albedo	percent*100	Range is 0 to 10000.
S-NPP	VIIRS M-Band channel 7 brightness temperature	K*100	Range is 0 to 32767.
43-44
METOP and NOAA        morning satellites^& daytime	AVHRR Channel 3 albedo	percent*100	Range is 0 to 10000.
METOP and NOAA        morning satellites^& nighttime	AVHRR Channel 3 brightness temperature	K*100	Range is 0 to 32767.
METOP and NOAA        afternoon satellites^%	AVHRR Channel 3 brightness temperature	K*100	Range is 0 to 32767.
S-NPP	VIIRS M-Band channel 12 brightness temperature	K*100	Range is 0 to 32767.
45-46
METOP and NOAA	AVHRR Channel 4 brightness temperature	K*100	Range is 0 to 32767.
S-NPP	VIIRS M-Band channel 15 brightness temperature	K*100	Range is 0 to 32767.
47-48
METOP and NOAA	AVHRR Channel 5 brightness temperature	K*100	Range is 0 to 32767.
S-NPP	VIIRS M-Band channel 16 brightness temperature	K*100	Range is 0 to 32767.
49-50	Navy Aerosol Analysis and Prediction System (NAAPS) sulfate optical depth	Numeric*1000	Range is 0 to 32767. (Range observed is 4 to 475)
51-52	Navy Aerosol Analysis and Prediction System (NAAPS) smoke optical depth	Numeric*1000	Range is 0 to 32767. (Range observed is 0 to 203)
53-54	Navy Aerosol Analysis and Prediction System (NAAPS) dust optical depth	Numeric*1000	Range is 0 to 32767. (Range observed is 13 to 188)
55-58	Spares	=0
59-60	4-digit year	Numeric	Range is 1998 to present year.
61-62	Navy Aerosol Analysis and Prediction System (NAAPS) total optical depth	Numeric*1000	Range is 0 to 32767. (Range observed is 27 to 623)
63-64	Gridded 1/10^th degree SST	deg C*10	Range is -20 to 350. A value of -800 means the data is over land.
65-66^#	HIRS Channel 1 brightness temperature	K*100	Range is 0 to 32767.
67-68^#	HIRS Channel 2 brightness temperature	K*100	Range is 0 to 32767.
69-70^#	HIRS Channel 3 brightness temperature	K*100	Range is 0 to 32767.
71-72^#	HIRS Channel 4 brightness temperature	K*100	Range is 0 to 32767.
73-74^#	HIRS Channel 5 brightness temperature	K*100	Range is 0 to 32767.
75-76^#	HIRS Channel 6 brightness temperature	K*100	Range is 0 to 32767.
77-78^#	HIRS Channel 7 brightness temperature	K*100	Range is 0 to 32767.
79-80^#	HIRS Channel 8 brightness temperature	K*100	Range is 0 to 32767.
81-82^#	HIRS Channel 9 brightness temperature	K*100	Range is 0 to 32767.
83-84^#	HIRS Channel 10 brightness temperature	K*100	Range is 0 to 32767.
85-86^#	HIRS Channel 11 brightness temperature	K*100	Range is 0 to 32767.
87-88^#	HIRS Channel 12 brightness temperature	K*100	Range is 0 to 32767.
89-90^#	HIRS Channel 13 brightness temperature	K*100	Range is 0 to 32767.
91-92^#	HIRS Channel 14 brightness temperature	K*100	Range is 0 to 32767.
93-94^#	HIRS Channel 15 brightness temperature	K*100	Range is 0 to 32767.
95-96^#	HIRS Channel 16 brightness temperature	K*100	Range is 0 to 32767.
97-98^#	HIRS Channel 17 brightness temperature	K*100	Range is 0 to 32767.
99-100^#	HIRS Channel 18 brightness temperature	K*100	Range is 0 to 32767.
101-102^#	HIRS Channel 19 brightness temperature	K*100	Range is 0 to 32767.
103-104^#	HIRS Channel 20 brightness temperature	K*100	Range is 0 to 32767.

^& - morning satellites include NOAA-15 (SST observation source = 4), NOAA-17 (SST observation source = 6), METOP-2(A) (SST observation source = 12) and METOP-1(B) (SST observation source = 11)

^% - afternoon satellites include NOAA-14 (SST observation source = 3), NOAA-16 (SST observation source = 2), NOAA-18 (SST observation source = 7), NOAA-19 (SST observation source = 8).  S-NPP (SST observation source = 9) is also an afternoon satellite but it is not applicable here.

# - bytes 65-104 are spares (=0) for S-NPP satellite (SST observation source = 9) since there is no HIRS instrument