NOAA Polar Orbiter Data User's Guide

Section 1.4.7

Blue line drawn across page to separate text from document title.
Image denotes media you're currently using--Web or CD.Introduction Page, NOAA POD Guide TOC, Acronyms
Previous Section, Next Section

1.4.7 NOAA-11

Operational dates: November 8, 1988 to April 11, 1995

Afternoon orbit: 1340 LST ascending node, 0140 LST descending node

AVHRR instrument: 5 channels

Spacecraft ID: 1 (same as TIROS-N)

Abnormalities: AVHRR instrument failed on Sept. 13, 1994.

Table 1.4.7-1 contains the central wave numbers for the AVHRR IR channels for NOAA-11. Table 1.4.7-2 contains the TOVS channel spectral response and HIRS/2 thermal band-correction coefficients for NOAA-11. Non-linearity corrections for NOAA-11 AVHRR Channel 4 and 5 are contained in Tables 1.4.7-3 and 1.4.7- 4, respectively. The non-linearity corrections are the difference between the measured target temperature and that temperature derived from a two-point linear calibration using a radiance of space (Nsp) of zero. The non-linearity correction can be obtained from Tables 1.4.7-3 and 1.4.7-4 by interpolation on the scene temperatures and the temperatures of the AVHRR's internal calibration target.

Figures 1.4.7-1 through 1.4.7-5 contain the spectral response curves for NOAA-11 AVHRR channels 1 through 5, respectively.

Table 1.4.7-1. NOAA-11 Central Wave Numbers for AVHRR IR Channels.
Temperature Range (K) Channel 3 (cm-1) Channel 4 (cm-1) Channel 5 (cm-1)
180-225 2663.50 926.81 841.40
225-275 2668.15 927.36 841.81
275-320 2671.40 927.83 842.20
270-310 2670.96 927.75 842.14
Note: The 270-310 K range is applicable for sea surface temperatures.

Table 1.4.7-2. NOAA-11 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 1 668.99 cm-1 15 micrometers 0.007 0.99996
2 678.89 cm-1 CO2 Band 0.010 0.99994
3 689.70 cm-1 CO2 Band 0.007 0.99992
4 703.25 cm-1 CO2 Band -0.003 0.99995
5 716.83 cm-1 CO2 Band 0.014 0.99991
6 732.11 cm-1 CO2 Band 0.019 0.99991
7 749.48 cm-1 CO2 Band 0.032 0.99988
8 900.51 cm-1 Window 0.077 0.99988
9 1031.19 cm-1 Ozone 0.068 0.99975
10 795.69 cm-1 Water Vapor -0.001 0.99994
11 1361.10 cm-1 Water Vapor 0.074 0.99972
12 1479.86 cm-1 Water Vapor 0.288 0.99994
13 2189.94 cm-1 4.3 micrometers 0.022 0.99994
14 2209.66 cm-1 CO2 Band 0.018 0.99995
15 2239.26 cm-1 CO2 Band 0.020 0.99995
16 2267.80 cm-1 CO2 Band 0.015 0.99993
17 2416.32 cm-1 CO2 Band 0.024 0.99991
18 2511.83 cm-1 Window 0.045 0.99990
19 2664.07 cm-1 Window 0.325 0.99949
20 14453.14 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

Table 1.4.7-3. Non-linearity errors for NOAA-11 Channel 4.
Target temperature (K) Internal Target Temperature (Degrees C)
10 15 20
320 4.29 3.71 3.25
315 3.50 2.98 2.55
310 2.85 2.33 1.91
305 2.23 1.73 1.32
295 1.05 0.68 0.22
285 0.24 -0.21 -0.67
275 -0.45 -0.79 -1.15
265 -1.06 -1.37 -1.66
255 -1.41 -1.72 -2.03
245 -1.70 -1.96 -2.22
235 -1.87 -2.10 -2.28
225 -1.90 -2.14 -2.36
215 -1.82 -2.02 -2.20
205 -1.54 -1.76 -1.98

Table 1.4.7-4. Non-linearity errors for NOAA-11 Channel 5.
Target temperature (K) Internal Target Temperature (Degrees C)
10 15 20
320 1.43 1.26 1.12
315 1.23 1.03 0.89
310 1.05 0.84 0.70
305 0.85 0.64 0.47
295 0.43 0.28 0.09
285 0.07 -0.07 -0.23
275 -0.19 -0.34 -0.47
265 -0.37 -0.51 -0.60
255 -0.60 -0.77 -0.78
245 -0.72 -0.90 -0.92
235 -0.84 -1.02 -1.00
225 -0.94 -1.06 -1.16
215 -1.12 -1.24 -1.16
205 -1.15 -1.27 -1.23

Table 1.4.7-5. PRT coefficients for all instruments on NOAA-11 (from NESS 107, App. B).
AVHRR
PRT counts to temperature coefficients
PRT a0 a1 a2 a3 a4
1 276.597 0.051275 1.363E-6 0.0 0.0
2 276.597 0.051275 1.363E-6 0.0 0.0
3 276.597 0.051275 1.363E-6 0.0 0.0
4 276.597 0.051275 1.363E-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 0.0
5 0.0
HIRS
IWT PRT Count to temperature coefficients
PRT a0 a1 a2 a3 a4
1 301.37210 6.52057E-03 9.05197E-08 4.73741E-11 8.29062E-16
2 301.37560 6.52283E-03 9.13565E-08 4.73871E-11 7.86019E-16
3 301.41250 6.51819E-03 9.18444E-08 4.75139E-11 7.30508E-16
4 301.37420 6.51875E-03 9.04524E-08 4.72894E-11 8.06020E-16
SSU
PRT count to temperature coefficients
a0 a1 a2
283.901 5.044E-03 1.18E-11
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 29.1014 .4242637 .3162073E-04
2A 28.9481 .4277704 .3185110E-04
1B 28.9854 .4269018 .3170732E-04
2B 29.0424 .4274570 .3191209E-04
Radiance of space (Nsp)
Channel Nsp( mW/sr- m2 - cm-1)
1 0.000086
2 0.000096
3 0.000084
4 0.000092


Figure showing NOAA-11 spectral response curve for AVHRR Channel 1

Figure showing NOAA-11 spectral response curve for AVHRR Channel 2

Figure showing NOAA-11 spectral response curve for AVHRR Channel 3

Figure showing NOAA-11 spectral response curve for AVHRR Channel 4

Figure showing NOAA-11 spectral response curve for AVHRR Channel 5

Amended May 5, 1999



Previous Section Top of Page Next Section