Post on 02-Jan-2016
description
GOES-13 Sounder Striping
Don HillgerNOAA/NESDIS/StAR/RAMMB
CIRA/Colorado State UniversityTim Schmit
NOAA/NESDIS/StAR/ASPBCIMSS/University of Wisconsin
Hourly GOES-13 Sounder striping from 24-h of limb (earth and space) measurements, East limb of earth, Julian Day
343-344
Note the largest striping for Sounder band-7
Hourly GOES-13 Sounder striping from 24-h of limb (earth and space) measurements, East limb of earth, Julian Day
344-345
Note the largest striping for Sounder band-7
Hourly GOES-13 Sounder striping from 24-h of limb (earth and space) measurements, West limb of earth, Julian Day
343-344
Note the larger striping for Sounder bands 6 and 7
Hourly GOES-13 Sounder striping from 24-h of limb (earth and space) measurements, West limb of earth, Julian Day
344-345
Note the larger striping for Sounder bands 6 and 7
Sounder Band
Central Wavelength
(μm)
Both Earth and Space Measurements
East LimbWest Limb
West to East ratio13-bit GVAR counts (0-
8191)
1 14.71 31.0 48.2 1.55
2 14.37 26.9 45.7 1.70
3 14.06 31.9 52.6 1.65
4 13.64 30.6 56.5 1.85
5 13.37 32.1 59.0 1.84
6 12.66 35.2 71.6 2.03
7 12.02 42.8 72.6 1.70
8 11.03 35.3 63.2 1.79
9 9.71 20.4 27.7 1.36
10 7.43 19.1 40.2 2.10
11 7.02 15.0 38.3 2.55
12 6.51 11.6 17.6 1.52
13 4.57 18.3 28.7 1.57
14 4.52 10.4 17.1 1.64
15 4.46 9.3 11.5 1.24
16 4.13 6.6 12.9 1.95
17 3.98 8.8 16.2 1.84
18 3.74 8.8 16.7 1.90
GOES-13 Sounder striping
(From 48 hours of limb (earth
and space) measurements on Julian days
343-345)
Note that the striping is
greater on the West limb than
on the East limb by about a factor of 2 for most bands.
East Limb, Space
West Limb, Space
East Limb, Earth
West Limb, Earth
Sounder Band
Central Wavelength
(μm)
Space-Only Measurements Earth-Only Measurements
East Limb West Limb
West to East ratio
East Limb West Limb
West to East ratio13-bit GVAR counts (0-
8191)13-bit GVAR counts (0-
8191)
1 14.71 5.77 5.85 1.01 8.70 12.46 1.43
2 14.37 4.81 4.60 0.96 6.33 6.67 1.05
3 14.06 3.71 3.43 0.92 9.21 13.51 1.47
4 13.64 2.24 1.95 0.87 12.72 30.25 2.38
5 13.37 2.04 1.95 0.96 14.64 35.56 2.43
6 12.66 1.97 2.33 1.18 22.92 51.34 2.24
7 12.02 3.56 4.78 1.34 49.21 64.22 1.31
8 11.03 2.92 3.45 1.18 31.00 37.08 1.20
9 9.71 3.12 3.91 1.25 17.69 24.11 1.36
10 7.43 2.89 3.16 1.09 14.20 30.81 2.17
11 7.02 3.20 3.75 1.17 14.46 39.30 2.72
12 6.51 4.43 4.68 1.06 10.06 11.10 1.10
13 4.57 4.30 4.59 1.07 27.21 38.30 1.41
14 4.52 5.25 6.66 1.27 12.55 20.13 1.60
15 4.46 8.48 10.29 1.21 10.09 11.67 1.16
16 4.13 2.46 2.61 1.06 8.09 14.56 1.80
17 3.98 1.90 2.32 1.22 10.75 17.67 1.64
18 3.74 1.51 2.32 1.53 9.82 15.73 1.60
Over land, Original
Over land, De-striped
Over water, Original
Over water, De-striped
Example of striping correction applied to Sounder band-7. Reduced striping (left to right) is seen for both water (top) and land (bottom) areas in enhanced images from. Striping however appears to have increased over the coldest cloud tops (top left to right).