A Second Look at Striping

Stan Kidder5 Oct 2012

2

Methodology• VIIRS SDR radiances were examined on two dates, 9 April

2012 and 29 September 2012• Examined the middle 37% of the elements (which are not

subject to bow-tie deletions)• Examined 22 granules (1056 scans) on 9 April and 25

granules (1200 scans) on 29 September near CONUS and near 1330 local time

• For each band, the mean radiance for each scan line minus the overall mean radiance was divided by an estimate of noise for each band. This is called the Normalized Deviation.

3

NoiseBand

Center Wavelength

(mm)

Noise (W m-2 sr-1 mm-1)

I1 0.640 0.2303I2 0.866 0.1762I3 1.61 0.0647I4 3.74 0.0023I5 11.45 0.0175

M1 0.412 0.1592M2 0.445 0.1558M3 0.488 0.1389M4 0.555 0.1301M5 0.672 0.1281M6 0.747 0.0483M7 0.875 0.0804M8 1.24 0.0576M9 1.38 0.0165

M10 1.61 0.0174M11 2.25 0.0290M12 3.75 0.0007M13 4.05 0.0013M14 8.55 0.0071M15 10.76 0.0044M16 12.00 0.0037

(Estimated from measured SNR or NEDT)

4

Range (max – min)of Normalized DeviationsBand 20120409 20120929 Change

M6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

5

M6

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

Blac

k =

satu

ratio

n?

6

M13

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

Range of data

may mask

striping in this image

Odd- and even-line striping

7

M10

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

8

M3

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

9

M7

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

10

M1

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

11

M2

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

12

M8

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

13

M4

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

14

M5

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

15

M12

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized DeviationsOdd- and even-line striping

16

I3

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

17

I1

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

18

I2

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

19

M15

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized DeviationsOdd- and even-line striping

20

M16

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

21

I4

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized DeviationsOdd- and even-line striping

22

M14

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

23

M11

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

24

I5

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized DeviationsOdd- and even-line striping

25

M9

Band 20120409 20120929 ChangeM6 133.58 27.39 -106.20M13 9.45 4.04 -5.42M10 8.32 6.89 -1.42M3 4.52 5.94 1.42M7 3.76 3.68 -0.08M1 3.52 5.41 1.89M2 3.29 6.15 2.85M8 3.25 2.76 -0.50M4 2.98 5.56 2.58M5 2.86 4.24 1.37M12 2.67 1.20 -1.47I3 2.56 2.37 -0.19I1 1.61 2.30 0.68I2 1.60 1.53 -0.07M15 1.58 1.24 -0.34M16 1.47 1.10 -0.37I4 1.15 0.62 -0.53M14 0.86 1.50 0.64M11 0.76 1.00 0.25I5 0.66 0.48 -0.18M9 0.66 0.72 0.06

Range of Normalized Deviations

26

Conclusions (1/2)

• Results are similar in April and September cases.• The M6 striping is smaller in September than it

was in April, but is still very large. Also, there appear to be saturation issues.

• Some channels seem to have odd- and even-line striping.

• Some of the differences between September and April may be caused by real scene effects.

27

Conclusions (2/2)

• Comparing with noise is interesting and useful, but whether or not one can see striping depends on the magnitude of striping in comparison with the range of data in a scene. It is difficult to see any evidence of striping in the M13 image, for example, even though statistically M13 has the second largest striping (compared to noise).

28

BACKUP SLIDESFrom previous study

29

I1 0.64mm

Very small deviation from Block Mean Radiance

No noticeable stripingHighly Enhanced Image

30

M6 – 0.747 mm

Very Large StripingUnenhanced Image

31

M13 – 4.05 mm

Moderate deviations from Block Mean Radiance, but hard to find striping

32

M10 – 1.61 mm

Moderate deviations—some striping visible in unenhanced image