NOAA Polar Orbiter Data User's GuideSection 1.4.4 |
Introduction Page,
NOAA POD Guide TOC,
Acronyms
Operational dates:
May 3, 1983 - June 21, 1984
July 1, 1985 - October 31, 1985
Morning orbit: 1930 LST ascending node, 0730 LST descending node
AVHRR instrument: 4 channels
Spacecraft ID: 6
Abnormalities: Primary oscillator began to operate sporadically on June 12, 1984. Between June 12 and 21, 1984, a small amount of GAC, LAC, and TOVS data were recorded. At this point NOAA-8 was turned off. It was not until July 1, 1985 that NOAA-8 was reactivated and all instruments checked out except the HIRS/2 instrument. Due to detector heating while the spacecraft tumbled, channels 1-12 of the HIRS/2 were lost.
Table 1.4.4-1 contains the central wave numbers for the AVHRR IR channels for NOAA-8. Table 1.4.4-2 contains the TOVS channel spectral response and HIRS/2 thermal band-correction coefficients for NOAA-8. Non-linearity errors for NOAA-8 AVHRR Channel 4 are contained in Table 1.4.4-3. Table 1.4.4-4 contains values of the corrected radiance of space, Nsp (which includes the non-linearity correction) for the NOAA-8 AVHRR IR channels.
Figures 1.4.4-1 through 1.4.4-4 contain the spectral response curves for NOAA-8 channels 1 through 4, respectively.
| Temperature Range (K) | Channel 3 (cm-1) | Channel 4 (cm-1) |
|---|---|---|
| 180-225 | 2631.52 | 913.360 |
| 225-275 | 2636.05 | 913.865 |
| 275-320 | 2639.18 | 914.305 |
| Instrument | Channel # | Central Wave # | Description | HIRS/2 Band-Correction Coefficients | |
|---|---|---|---|---|---|
| b | c | ||||
| HIRS/2 | 1 | 667.41 cm-1 | 15 micrometers | 0.099 | 0.99971 |
| 2 | 679.45 cm-1 | CO2 Band | 0.147 | 0.99962 | |
| 3 | 690.90 cm-1 | CO2 Band | 0.143 | 0.99964 | |
| 4 | 702.97 cm-1 | CO2 Band | 0.010 | 0.99991 | |
| 5 | 717.56 cm-1 | CO2 Band | -0.001 | 0.99994 | |
| 6 | 732.97 cm-1 | CO2 Band | 0.193 | 0.99955 | |
| 7 | 747.90 cm-1 | CO2 Band | -0.104 | 1.00013 | |
| 8 | 901.08 cm-1 | Window | 0.429 | 0.99931 | |
| 9 | 1027.11 cm-1 | Ozone | 0.140 | 0.99984 | |
| 10 | 1224.05 cm-1 | Water Vapor | 0.450 | 0.99988 | |
| 11 | 1366.17 cm-1 | Water Vapor | 0.108 | 0.99978 | |
| 12 | 1486.92 cm-1 | Water Vapor | 0.530 | 1.00008 | |
| 13 | 2189.28 cm-1 | 4.3 micrometers | 0.051 | 1.00022 | |
| 14 | 2211.71 cm-1 | CO2 Band | 0.063 | 1.00029 | |
| 15 | 2238.06 cm-1 | CO2 Band | 0.015 | 0.99992 | |
| 16 | 2271.43 cm-1 | CO2 Band | 0.029 | 1.00004 | |
| 17 | 2357.11 cm-1 | CO2 Band | 0.018 | 0.99993 | |
| 18 | 2515.53 cm-1 | Window | 0.080 | 1.00007 | |
| 19 | 2661.85 cm-1 | Window | 0.489 | 1.00061 | |
| 20 | 14355.00 cm-1 | Visible Window | n/a | n/a | |
| MSU | 1 | 1.6779 cm-1 | n/a | n/a | n/a |
| 2 | 1.7927 cm-1 | n/a | n/a | n/a | |
| 3 | 1.8334 cm-1 | n/a | n/a | n/a | |
| 4 | 1.9331 cm-1 | n/a | n/a | n/a | |
| SSU | 1 | 669.988 cm-1/15 mb | n/a | n/a | n/a |
| 2 | 669.628 cm-1/5 mb | n/a | n/a | n/a | |
| 3 | 669.357 cm-1/1.5 mb | n/a | n/a | n/a | |
| Target temperature (K) | Error (K) |
|---|---|
| 315 | 0.8 |
| 305 | 0.3 |
| 295 | -0.1 |
| 285 | -0.3 |
| 275 | -0.4 |
| 255 | -0.4 |
| 235 | 0.2 |
| 225 | 0.7 |
| 205 | 2.2 |
| 0 | 0.0 |
| Channel | Nsp (mW/(m2-sr-cm-1)) |
|---|---|
| 3 | 0.0 |
| 4 | -2.784 |
| AVHRR | |||||
|---|---|---|---|---|---|
| PRT counts to temperature coefficients | |||||
| PRT | a0 | a1 | a2 | a3 | a4 |
| 1 | 276.585 | 0.05136 | -9.99E-8 | 0.0 | 0.0 |
| 2 | 276.605 | 0.05122 | 6.86E-8 | 0.0 | 0.0 |
| 3 | 276.591 | 0.05133 | -1.381E-7 | 0.0 | 0.0 |
| 4 | 276.592 | 0.05133 | -1.489E-7 | 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 | -2.784 | ||||
| 5 | -2.784 | ||||
| HIRS | |||||
| IWT PRT Count to temperature coefficients | |||||
| PRT | a0 | a1 | a2 | a3 | a4 |
| 1 | 301.77 | 7.1073E-03 | 3.9559E-07 | 9.4570E-11 | 0.0 |
| 2 | 302.23 | 7.7872E-03 | 7.1948E-07 | 1.3802E-10 | 0.0 |
| 3 | 302.27 | 7.7709E-03 | 7.0700E-07 | 1.3688E-10 | 0.0 |
| 4 | 301.71 | 6.9976E-03 | 3.3206E-07 | 8.6808E-11 | 0.0 |
| SSU | |||||
| PRT count to temperature coefficients | |||||
| a0 | a1 | a2 | |||
| 285.2978 | 4.817E-03 | 1.119E-08 | |||
| 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 | 29.4857 | .4247172 | .320960E-04 | ||
| 2A | 29.3123 | .4326844 | .3282283E-04 | ||
| 1B | 29.3471 | .4247339 | .3165123E-04 | ||
| 2B | 27.9719 | .4285466 | .3095837E-04 | ||
| Radiance of space (Nsp) | |||||
| Channel | Nsp( mW/sr- m2 - cm-1) | ||||
| 1 | 0.000086 | ||||
| 2 | 0.000096 | ||||
| 3 | 0.000084 | ||||
| 4 | 0.000092 | ||||




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