Table 1. GOES-8/9 sounder noise performance compared to GOES-7 VAS and NOAA-12 HIRS. NEDR is the inflight measured noise equivalent radiance in mW/m2/ster/cm-1; spec is the prelaunch specified value. NEDT is the corresponding inflight measured noise equivalent temperature at 290 K; GOES-8 NEDT can be inferred by multiplying GOES-9 NEDT by NEDR(G-8)/NEDR(G-9). Improvements over GOES 7 and NOAA-12 include adjustments for FOV differences.
NEDTNEDR Improvement ratio
Wave lengthWave NumberG-9G-8 G-9 (spec)G9/G7 G-9/N-12
Ch (um)cm-1 (290K) (mW/m2/ster/cm-1) (FOV adjusted)
Longwave carbon dioxide (CO2) sensitive bands define cloud heights and amounts and enable clear sky temperature profile retrievals;
1 14.7 680.272 0.75 1.63 1.20 (0.66) 7.7 1.2
2 14.4 694.444 0.49 1.41 0.80 (0.58) 5.6 1.3
3 14.1 709.22 0.36 0.94 0.56 (0.54) 2.5 1.2
4 13.9 719.424 0.28 0.65 0.46 (0.45) 1.0
5 13.4 746.269 0.27 0.74 0.45 (0.44) 3.1 0.9
6 12.7 787.402 0.12 0.32 0.19 (0.25) 5.9
7 12.0 833.333 0.08 0.21 0.13 (0.16)
Midwave water vapor (H2O) sensitive bands improve the depiction of vertical and horizontal gradients of moisture;
8 11.0 909.091 0.07 0.15 0.10 (0.16) 1.3 2.1
9 9.7 1030.93 0.07 0.20 0.11 (0.33) 2.9
10 7.5 1333.33 0.09 0.091 0.076 (0.16) 5.6
11 7.0 1428.57 0.07 0.091 0.047 (0.12) 25.0 8.3
12 6.5 1666.67 0.15 0.119 0.086 (0.15) 3.0
Shortwave CO2sensitive bands enhance boundary layer investigations; and split windows provide atmosphere corrected views of the earth surface.
13 4.57 2188.18 0.09 0.012 0.008 (0.013) 1.6
14 4.52 2212.39 0.08 0.011 0.007 (0.013) 7.7 1.1
15 4.45 2247.19 0.08 0.012 0.006 (0.013) 11.1 1.4
16 4.13 2421.31 0.08 0.004 0.003 (0.008)
17 3.98 2512.56 0.10 0.005 0.003 (0.008) 4.8 1.4
18 3.7 2702.7 0.05 0.002 0.001 (0.004) 2.1

Field of view (FOV) sizes:

  • WaveNumbers added to table from http://www.spectralcalc.com/spectralcalc.php Units Converter Thomas A. Watson Tue May 13 2008

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