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NOAA KLM User's Guide

Appendix G.3
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APPENDIX G.3 Changes made to Navy's SST Product

June 7, 1999
Began using NOAA-15 for operational processing of MCSST's. Equations based on April 1999 global drifting buoy match ups. Modified nighttime cloud screening, replacing AVHRR Ch5 - Ch3 test with AVHRR Ch4 - Ch3 test. The operational MCSST equations are the NLSST DAY SPLIT and the NLSST NIGHT TRIPLE.

NLSST DAY SPLIT
NL(4/5) = .9367T4 + .0864Tf (T4-T5) + .5979 (T4-T5)(SEC(A) -1) - 253.8050

NLSST NIGHT TRIPLE
NL(3/4/5) = .9799 T4 + .0364Tf (T3-T5) + 1.195 (SEC (A) -1) - 266.0100
T3 = Channel 3 Brightness Temperature (K)
T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

June 24, 1999
NOAA-15: Modified AVHRR Ch4 - Ch5 cloud screening test. Test originally was Ch4 - Ch5 < 3.5, has been modified to 0 < (Ch4 - Ch5) < 3.5.

August 23,1999
NOAA-15: Implemented new visible cloud threshold table, generated with data collected during the July - Aug 1999 time frame.

February 28, 2000
NOAA-15: Operationally implemented new coefficients for the HIRS two part test.

March 7, 2001
NOAA-16: Initiated operational distribution of NOAA-16 MCSST orbital files.

Implemented Orbital MCSST equations derived for NOAA-16 SEATEMP processing. Equations based on December 2000 global drifting buoy matches. The operational MCSST equations are the NLSST DAY SPLIT and the NLSST NIGHT TRIPLE.

NLSST DAY SPLIT
NL(4/5) = .9139T4 + .0770Tf (T4-T5) + .7659 (T4-T5)(SEC(A) –1) – 247.9117

NLSST NIGHT TRIPLE
NL(3/4/5) = .9407T4 + .0330Tf (T3-T5) + 1.6042 (SEC(A) –1) – 255.0355

T3 = Channel 3 Brightness Temperature (K)
T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

April 16, 2001
NOAA-16: Updated NOAA-16 equations based on March 2001 global drifting buoy matches. The operational MCSST equations are the NLSST DAY SPLIT and the NLSST NIGHT TRIPLE.

NLSST DAY SPLIT
NL(4/5) = .9233T4 + .0755Tf (T4-T5) + .8015 (T4-T5)(SEC(A) –1) – 250.6939

NLSST NIGHT TRIPLE
NL(3/4/5) = .9627T4 + .0327Tf (T3-T5) + 1.5653 (SEC(A) –1) – 261.4709

T3 = Channel 3 Brightness Temperature (K)
T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

June 28, 2001
NOAA-16: Implemented a field test for type 159 processing in areas of high specular reflectance. This test will help eliminate the generation of aerosol contaminated observations.

October 9, 2001
NOAA-16: Implemented a two-part nighttime aerosol test. The test has to fail both a SST intercomparison (MC(3/4) equation minus NL (4/5) equation) and a field test to be rejected as aerosol contaminated. Implemented reliability values that are assigned to each MCSST observation.

October 17, 2001
NOAA-16: Updated NOAA-16 equations based on September 2001 global drifting buoy matches. The operational MCSST equations are the NLSST DAY SPLIT and the NLSST NIGHT TRIPLE.

NLSST DAY SPLIT
NL(4/5) = .9171T4 + .0795Tf (T4-T5) + .7975 (T4-T5)(SEC(A) –1) – 248.8961

NLSST NIGHT TRIPLE
NL(3/4/5) = .9622T4 + .0336Tf (T3-T5) + 1.6073 (SEC(A) –1) – 261.3291

T3 = Channel 3 Brightness Temperature (K)
T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

November 27, 2001
NOAA-16: Increased day/night attempts per target from 10/3 to 15/15 attempts, respectively.

March 25, 2002
NOAA-16: Updated NOAA-16 daytime equations based on February 2002 global drifting buoy matches. The operational MCSST daytime equation is the NLSST DAY SPLIT.

NLSST DAY SPLIT
NL(4/5) = .9246T4 + .0775Tf (T4-T5) + .7664 (T4-T5)(SEC(A) –1) – 251.1504

T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

April 30, 2002
NOAA-16: Implemented 1 km Land/Sea tag file to allow better coastal MCSST generation.

October 22, 2002
NOAA-17: Initiated operational distribution of NOAA-17 MCSST orbital files.

Implemented Orbital MCSST equations derived for NOAA-17 SEATEMP processing. Equations based on August/September 2002 global drifting buoy matches. The operational MCSST equations are the NLSST DAY SPLIT and the NLSST NIGHT TRIPLE.

NLSST DAY SPLIT
NL(4/5) = .9404T4 + .0838Tf (T4-T5) + 1.1098 (T4-T5)(SEC(A) –1) – 255.1277

NLSST NIGHT TRIPLE
NL(3/4/5) = .9684T4 + .0334Tf (T3-T5) + 1.9245 (SEC(A) –1) – 262.5276

T3 = Channel 3 Brightness Temperature (K)
T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

November 5, 2002
NOAA-16: Updated NOAA-16 daytime equations based on September 2002 global drifting buoy matches. The operational MCSST daytime equation is the NLSST DAY SPLIT.

NLSST DAY SPLIT
NL(4/5) = .9128T4 + .0803Tf (T4-T5) + .7709 (T4-T5)(SEC(A) –1) – 247.7182

T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

November 7, 2002
NOAA-17: Initiated operational production and distribution of MCSST’s generated with NOAA-17 LAC data.

April 22, 2003
NOAA-16: Implemented new Visible Cloud Threshold table generated with data collected during the March/April 2003 time frame.

May 28, 2003
NOAA-16 and NOAA-17: Replaced the linear interpolation of Level 1b earth location data with three-point Lagrangian interpolation. This will improve the accuracy of the earth location towards the edge of the scan.

June 11, 2003
NOAA-16 and NOAA-17: Modified processing code to enable MCSST production when solar zenith angles are between 75-90 and channel 3a data is present. Currently a type 159 (relaxed daytime) observation is attempted.

July 2, 2003
NOAA-17: Updated NOAA-17 daytime equations based on May/June 2003 global drifting buoy matches. The operational MCSST daytime equation is the NLSST DAY SPLIT.

NLSST DAY SPLIT
NL(4/5) = .9304T4 + .0870Tf (T4-T5) + 1.0076 (T4-T5)(SEC(A) –1) – 252.4396

T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

November 24, 2003
NOAA-16: Updated NOAA-16 daytime equations based on November 2003 global drifting buoy matches. The operational MCSST daytime equation is the NLSST DAY SPLIT.

NLSST DAY SPLIT
NL(4/5) = .9296T4 + .0813Tf (T4-T5) + .7214 (T4-T5)(SEC(A) –1) – 252.4412

T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

February 12, 2004
NOAA-16: Updated NOAA-16 daytime equations based on global drifting buoy matches. The operational MCSST daytime equation is the NLSST DAY SPLIT.

NLSST DAY SPLIT
NL(4/5) = .9128T4 + .0803Tf (T4-T5) + .7709 (T4-T5)(SEC(A) –1) – 247.7182

T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

May 19, 2004
NOAA-16: Updated NOAA-16 daytime equations based on global drifting buoy matches. The operational MCSST daytime equation is the NLSST DAY SPLIT.

NLSST DAY SPLIT
NL(4/5) = .9296T4 + .0813Tf (T4-T5) + .7214 (T4-T5)(SEC(A) –1) – 252.4412

T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

August 24, 2004
NOAA-16 and NOAA-17: Modified nighttime low stratus cloud screening test, replacing AVHRR ch5-ch3>0 test with AVHRR ch4-ch3>0 test.

June 7, 2005
NOAA-16: Implemented Orbital MCSST equations derived for NOAA-16 SeaTemp processing. Regression necessary due to improved ch4 + ch5 calibration precision in new NOAA-N formatted 1B data. Equations based on May 2005 global drifting buoy matches. The operational MCSST equations are the NLSST DAY SPLIT and the NLSST NIGHT TRIPLE.

NLSST DAY SPLIT
NL(4/5) = .9018T4 + .0824Tf (T4-T5) + .6923 (T4-T5)(SEC(A) –1) – 244.5447

NLSST NIGHT TRIPLE
NL(3/4/5) = .9802T4 + .0331Tf (T3-T5) + 1.7227 (SEC(A) –1) – 266.5712

T3 = Channel 3 Brightness Temperature (K)
T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

NOAA-17: Implemented Orbital MCSST equations derived for NOAA-17 SeaTemp processing. Regression necessary due to improved ch4 + ch5 calibration precision in new NOAA-N formatted 1B data. Equations based on May 2005 global drifting buoy matches. The operational MCSST equations are the NLSST DAY SPLIT and the NLSST NIGHT TRIPLE.

NLSST DAY SPLIT
NL(4/5) = .9367T4 + .0848Tf (T4-T5) + 1.0270 (T4-T5)(SEC(A) –1) – 254.2330

NLSST NIGHT TRIPLE
NL(3/4/5) = .9984T4 + .0329Tf (T3-T5) + 1.9592 (SEC(A) –1) – 271.3281

T3 = Channel 3 Brightness Temperature (K)
T4 = Channel 4 Brightness Temperature (K)
T5 = Channel 5 Brightness Temperature (K)
Tf = Analyzed Field Temperature (C)
A = Satellite Zenith Angle

Amended October 19, 2001

Amended October 31, 2002

Amended November 18, 2003

Amended June 23, 2005

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