NOAA Polar Orbiter Data User's Guide
Section 1.4.3
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1.4.3 NOAA-7
Operational dates: August 24, 1981 - February 1, 1985
Afternoon orbit: 1430 LST ascending node, 0230 LST descending
node
AVHRR instrument: 5 channels
Spacecraft ID: 4
Table 1.4.3-1 contains the central wave numbers for the AVHRR IR
channels for NOAA-7. Table 1.4.3-2 contains the TOVS channel
spectral response and HIRS/2 thermal band-correction coefficients
for NOAA-7. Non-linearity errors for NOAA-7 AVHRR Channels 4 and 5
are contained in Table 1.4.3-3. Table 1.4.3-4 contains values of
the corrected radiance of space, Nsp (which includes the
non-linearity correction) for the NOAA-7 AVHRR IR channels.
Figures 1.4.3-1 through 1.4.3-5 contain the spectral response
curves for NOAA-7 AVHRR Channels 1 through 5, respectively.
Table 1.4.3-1. NOAA-7 Central Wave Numbers for AVHRR IR
Channels.
| Temperature Range (K) |
Channel 3 (cm-1) |
Channel 4 (cm-1) |
Channel 5 (cm-1) |
| 180-225 |
n/a |
926.20 |
840.100 |
| 225-275 |
2670.3 |
926.80 |
840.500 |
| 275-320 |
2671.9 |
927.22 |
840.872 |
Table 1.4.3-2. NOAA-7 TOVS Channel Spectral Response and
HIRS/2 Thermal Band-Correction Coefficients.
| Instrument |
Channel # |
Central Wave # |
Description |
HIRS/2 Band-Correction
Coefficients |
| b |
c |
| HIRS/2 |
1 |
667.92 cm-1 |
15 micrometers |
-0.010 |
1.00001 |
| 2 |
679.21 cm-1 |
CO2 Band |
0.100 |
0.99973 |
| 3 |
691.56 cm-1 |
CO2 Band |
-0.018 |
0.99997 |
| 4 |
704.63 cm-1 |
CO2 Band |
0.026 |
0.99989 |
| 5 |
717.05 cm-1 |
CO2 Band |
-0.009 |
0.99995 |
| 6 |
733.20 cm-1 |
CO2 Band |
-0.081 |
1.00008 |
| 7 |
749.20 cm-1 |
CO2 Band |
-0.054 |
1.00003 |
| 8 |
898.94 cm-1 |
Window |
0.332 |
0.99942 |
| 9 |
1027.38 cm-1 |
Ozone |
0.205 |
0.99987 |
| 10 |
1224.89 cm-1 |
Water Vapor |
0.469 |
0.99994 |
| 11 |
1363.85 cm-1 |
Water Vapor |
0.114 |
0.99983 |
| 12 |
1489.06 cm-1 |
Water Vapor |
0.573 |
1.00028 |
| 13 |
2183.05 cm-1 |
4.3 micrometers |
0.047 |
1.00013 |
| 14 |
2208.28 cm-1 |
CO2 Band |
0.060 |
1.00028 |
| 15 |
2239.84 cm-1 |
CO2 Band |
0.021 |
0.99993 |
| 16 |
2271.33 cm-1 |
CO2 Band |
0.032 |
1.00008 |
| 17 |
2357.55 cm-1 |
CO2 Band |
0.032 |
1.00005 |
| 18 |
2512.83 cm-1 |
Window |
0.026 |
0.99968 |
| 19 |
2663.79 cm-1 |
Window |
0.637 |
1.00171 |
| 20 |
14453.14 cm-1 |
Visible Window |
n/a |
n/a |
| MSU |
1 |
1.6779 cm-1 |
|
|
|
| 2 |
1.7927 cm-1 |
|
|
|
| 3 |
1.8337 cm-1 |
|
|
|
| 4 |
1.9331 cm-1 |
|
|
|
| SSU |
1 |
669.988 cm-1/15 mb |
|
|
|
| 2 |
669.628 cm-1/5 mb |
|
|
|
| 3 |
669.357 cm-1/1.5 mb |
|
|
|
Table 1.4.3-3. Non-linearity errors for NOAA-7 Channels 4
and 5.
| Target temperature (K) |
Channel 4 Error (K) |
Channel 5 Error (K) |
| 315 |
1.66 |
1.08 |
| 305 |
1.05 |
0.64 |
| 295 |
0.49 |
0.31 |
| 285 |
0.0 |
0.0 |
| 275 |
-0.38 |
-0.22 |
| 255 |
-0.66 |
-0.55 |
| 235 |
-0.73 |
-0.86 |
| 225 |
-0.61 |
-0.71 |
| 205 |
-0.19 |
-0.86 |
| 0 |
0.0 |
0.0 |
Table 1.4.3-4. Corrected values for NOAA-7
Nsp.
| Channel |
Nsp
(mW/(m2-sr-cm-1)) |
| 3 |
0.0 |
| 4 |
-1.176 |
| 5 |
-1.346 |
Table 1.4.3-5. PRT coefficients for all instruments on
NOAA-7 (from NESS 107, App. B).
| AVHRR |
| PRT counts to temperature coefficients |
| PRT |
a0 |
a1 |
a2 |
a3 |
a4 |
| 1 |
277.099 |
5.048E-2 |
2.823E-6 |
0.0 |
0.0 |
| 2 |
276.734 |
5.069E-2 |
2.493E-6 |
0.0 |
0.0 |
| 3 |
276.876 |
5.148E-2 |
1.040E-6 |
0.0 |
0.0 |
| 4 |
276.160 |
5.128E-2 |
1.414E-6 |
0.0 |
0.0 |
| PRT weighting factors |
| b1 |
b2 |
b3 |
b4 |
| 0.25 |
0.25 |
0.25 |
0.25 |
| Radiance of space (Nsp) including
nonlinearity correction |
| Channel |
Nsp
(mW/sr-m2-cm-1) |
| 3 |
0.0 |
| 4 |
-1.176 |
| 5 |
-1.346 |
| HIRS |
| IWT PRT Count to temperature coefficients |
| PRT |
a0 |
a1 |
a2 |
a3 |
a4 |
| 1 |
301.44 |
6.6679E-03 |
1.4998E-07 |
5.5231E-11 |
0.0 |
| 2 |
301.91 |
7.2367E-03 |
4.2741E-07 |
9.0509E-11 |
0.0 |
| 3 |
301.88 |
7.1208E-03 |
3.7177E-07 |
8.2989E-11 |
0.0 |
| 4 |
301.41 |
6.4985E-03 |
6.3052E-08 |
4.1470E-11 |
0.0 |
| SSU |
| PRT count to temperature coefficients |
| a0 |
a1 |
a2 |
| 283.9218 |
4.85751E-03 |
0.0 |
| Thermistor to temperature coefficients |
| b0 |
b1 |
b2 |
b3 |
| 375.969 |
-203.161 |
179.13 |
-85.16 |
| c0 |
c1 |
c2 |
c3 |
| 375.969 |
-203.161 |
179.13 |
-85.16 |
| MSU |
| PRT Count to resistance coefficients |
| K0 |
495.6 |
| K1 |
107.8 |
| PRT Resistance to temperature coefficients |
| |
e0 |
e1 |
e2 |
| 1A |
28.976 |
.42694 |
.31737E-04 |
| 2A |
28.995 |
.42627 |
.31775E-04 |
| 1B |
28.945 |
.42628 |
.31603E-04 |
| 2B |
28.964 |
.42498 |
.31389E-04 |
| Radiance of space (Nsp) |
| Channel |
Nsp( mW/sr- m2 -
cm-1) |
| 1 |
0.000086 |
| 2 |
0.000096 |
| 3 |
0.000084 |
| 4 |
0.000092 |
Amended May 5,
1999