1. Ozone Comparison between Pandora #34, the Dobson #061, OMI, and OMPS at Boulder Colorado for the period December 2013 – June 2016.
J. Herman, R Evans, A. Cede, N. Abuhassan, I. Petropavlovskikh, and G. McConville
Pandora is small spectrometer system measuring between 290 and 530 nm with 0.5 nm resolution.
O3, SO2, HCHO, NO2 – Total Column and Profiles

2. Dobson Spectroradiometer
Use only AD-DSGQP measurement (A–D pair wavelengths direct sun using a ground quartz plate for clear-sky conditions)

3. Typical Pandora O3 Measurements Every 80 Seconds

4. Ozone Annual Cycle Boulder Colorado

5. +

8. AURA - OMI

9. +

11. Summary Pandora + Instrument Mean Offest (DU) Mean Offset (%) Slope
(DU/Year)
Slope (%/Year)
OMI
Pan34
0.5 ± 7
0.3
1.2 ± 0.4
0.4
OMPS
5 ± 15
1.6
1.0 ± 0.4
Dobson(BP)
2.7 ± 6
0.8
2.0 ± 0.2
0.6
Dobson(BDM)
5 ± 6
2.2 ± 0.2
0.7
SBUV19
3 ± 11
1.0
1.3 ± 0.9
Mean
2.8 ± 5
1.1
1.7 ± 0.3

12. Summary Dobson (BP) + Instrument Mean Offest (DU) Mean Offset (%)
Slope
(DU/Year)
Slope (%/Year)
OMI
Dobson
2.4 ± 6
-0.8
-1.4 ± 0.3
0.4
OMPS
3 ± 7
1.0
-1.6 ± 0.3
-0.5
Pan34
-2.7 ± 6
-2.0 ± 0.2
-0.7
SBUV
0.3 ± 10 DU
0.1
-1.6 ± 1.0
Mean
0.8
-0.1
-1.7
-0.3

13. Summary Dobson (BDM) + Instrument Mean Offest (DU) Mean Offset (%)
Slope
(DU/Year)
Slope (%/Year)
OMI
Dobson
-4.9±6
-1.5
-1.6 ± 0.3
-0.5
OMPS
0.08 ± 8
0.03
-1.8
-0.6
Pan34
-5 ± 6
-1.6
-2.2 ± 0.2
-0.7
SBUV
-2 ± 10
-1.7 ± 1
Mean
-2.9
-0.9