NOAA Polar Orbiter Data User's GuideSection 1.4.2 |
Introduction Page, NOAA POD Guide TOC, AcronymsOperational dates:
June 27, 1979 - March 5, 1983
July 3, 1984 - November 16, 1986
Morning orbit: 1930 LST ascending node, 0730 LST descending node
AVHRR instrument: 4 channels
Spacecraft ID: 2
Abnormalities: NOAA-6 was reactivated on July 3, 1984 to collect selected LAC/HRPT data because of the loss of NOAA-8.
Table 1.4.2-1 contains the central wave numbers for the AVHRR IR channels for NOAA-6. Table 1.4.2-2 contains the TOVS channel spectral response and HIRS/2 thermal band-correction coefficients for NOAA-6. Non-linearity errors for NOAA-6 AVHRR Channel 4 are contained in Table 1.4.2-3. Table 1.4.2-4 contains values of the corrected radiance of space, Nsp(which includes the non-linearity correction) for the NOAA-6 AVHRR IR channels.
Figures 1.4.2-1 through 1.4.2-4 contain the spectral response curves for NOAA-6 AVHRR channels 1 through 4, respectively.
| Table 1.4.2-1. NOAA-6 Central Wave Numbers for AVHRR IR Channels. | ||
| Temperature Range (K) | Ch. 3 (cm-1) | Ch. 4 (cm-1) |
| 180-225 | 2649.90 | 910.72 |
| 225-275 | 2653.90 | 911.41 |
| 275-320 | 2658.05 | 912.14 |
| Instrument | Channel # | Central Wave # | Description | HIRS/2 Band-Correction Coefficients | |
|---|---|---|---|---|---|
| b | c | ||||
| HIRS/2 | 1 | 668.02 cm-1 | 15 micrometers | 0.025 | 0.99992 |
| 2 | 679.94 cm-1 | CO2 Band | 0.151 | 0.99900 | |
| 3 | 690.44 cm-1 | CO2 Band | 0.115 | 0.99970 | |
| 4 | 704.69 cm-1 | CO2 Band | 0.041 | 0.99984 | |
| 5 | 717.43 cm-1 | CO2 Band | -0.035 | 1.00000 | |
| 6 | 732.47 cm-1 | CO2 Band | 0.066 | 0.99980 | |
| 7 | 748.48 cm-1 | CO2 Band | -0.101 | 1.00012 | |
| 8 | 900.64 cm-1 | Window | 0.185 | 0.99961 | |
| 9 | 1029.48 cm-1 | Ozone | 0.268 | 0.99990 | |
| 10 | 1217.77 cm-1 | Water Vapor | -0.205 | 0.99877 | |
| 11 | 1368.05 cm-1 | Water Vapor | 0.073 | 0.99966 | |
| 12 | 1485.76 cm-1 | Water Vapor | 0.597 | 1.00026 | |
| 13 | 2190.60 cm-1 | 4.3 micrometers | 0.022 | 1.00000 | |
| 14 | 2210.09 cm-1 | CO2 Band | -0.001 | 0.99978 | |
| 15 | 2237.76 cm-1 | CO2 Band | 0.029 | 0.99999 | |
| 16 | 2269.43 cm-1 | CO2 Band | 0.015 | 0.99991 | |
| 17 | 2360.42 cm-1 | CO2 Band | 0.011 | 0.99984 | |
| 18 | 2514.97 cm-1 | Window | 0.051 | 0.99985 | |
| 19 | 2654.58 cm-1 | Window | 0.482 | 1.00042 | |
| 20 | 14453.14 cm-1 | Visible Window | n/a | n/a | |
| MSU | 1 | 1.6599 cm-1 | n/a | n/a | n/a |
| 2 | 1.7734 cm-1 | n/a | n/a | n/a | |
| 3 | 1.6488 cm-1 | n/a | n/a | n/a | |
| 4 | 1.7385 cm-1 | n/a | n/a | n/a | |
| SSU | 1 | 669.998 cm-1/15 mb | n/a | n/a | n/a |
| 2 | 669.620 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 | 0.5 |
| 295 | 0.3 |
| 285 | 0.0 |
| 275 | -0.4 |
| 255 | -0.8 |
| 245 | -1.4 |
| 235 | -1.4 |
| 225 | -2.0 |
| 215 | -2.0 |
| 205 | -2.8 |
| 195 | -2.6 |
| 185 | -2.0 |
| 0 | 0.0 |
| Channel | Nsp (mW/(m2-sr-cm-1)) |
|---|---|
| 3 | 0.0 |
| 4 | -2.18222 |
| AVHRR | |||||
|---|---|---|---|---|---|
| PRT counts to temperature (K) coefficients | |||||
| PRT | a0 | a1 | a2 | a3 | a4 |
| 1 | 278.3863101 | 3.1620496E-2 | 4.9133034E-5 | 0.0 | 0.0 |
| 2 | 278.2352898 | 3.0384174E-2 | 5.1555794E-5 | 0.0 | 0.0 |
| 3 | 278.0691316 | 4.2528998E-2 | 1.6065146E-5 | 0.0 | 0.0 |
| 4 | 277.6288372 | 4.0905453E-2 | 1.9771519E-5 | 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 | -2.18222 | ||||
| 5 | -2.18222 | ||||
| HIRS | |||||
| IWT PRT Count to temperature coefficients | |||||
| PRT | a0 | a1 | a2 | a3 | a4 |
| 1 | 301.3386 | 6.50696E-03 | 8.61837E-08 | 4.78285E-11 | 1.163E-15 |
| 2 | 301.368 | 6.496E-03 | 8.67631E-08 | 4.80667E-11 | 1.09312E-15 |
| 3 | 301.4294 | 6.49817E-03 | 8.5749E-08 | 4.7748E-11 | 1.15969E-15 |
| 4 | 301.382 | 6.4998E-03 | 8.60846E-08 | 4.7749E-11 | 1.1608E-15 |
| SSU | |||||
| PRT count to temperature coefficients | |||||
| a0 | a1 | a2 | |||
| 284.1571 | 4.75532E-03 | 6.34256E-09 | |||
| 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 | 29.3271 | .425427 | .3165629E-04 | ||
| 2A | 29.3083 | .4260801 | .314991E-04 | ||
| 1B | 29.2923 | .426132 | .315241E-04 | ||
| 2B | 29.3731 | .4255765 | .317602E-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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