Title: AATS-14 on the J-31 in INTEX-B/MILAGRO: Comparisons to data collected by aerosol sensors on Terra, Aqua, Aura and suborbital platforms
1AATS-14 on the J-31 in INTEX-B/MILAGRO
Comparisons to data collected by aerosol sensors
on Terra, Aqua, Aura and suborbital platforms
- Jens Redemann, J. Livingston, P. Russell, R.
Johnson, Q. Zhang, L. Remer, R. Kahn, O. Torres,
B. Veihelmann, P. Veefkind, A. Smirnov, B. Holben
- BAERI / SRI / NASA Ames / Univ. of Colorado /
PNNL / NASA Goddard / JPL / KNMI - http//geo.arc.nasa.gov/sgg/INTEX-B/index.html
- email jredemann_at_mail.arc.nasa.gov
2Outline
- J-31 flight plans
- AATS-14 results
- AATS vs. MODIS
- AATS vs. OMI (UV and multi-wavelength)
- AATS vs. MODIS vs. MISR
- Extinction profiles
- Collaboration and science goals with other J-31
instruments - Summary / Future tasks
3- NASA Ames Airborne Tracking Sunphotometer,
AATS-14 - Measures direct solar beam transmission _at_
- 353.5 380.0 449.0 499.4 525.0
605.7 675.1 778.4 864.5 939.7 1019.1
1241.3 1557.8 2139.0 nm - Yields
- aerosol optical depth aerosol extinction when
A/C flies profiles - columnar water vapor (ozone) water vapor
(ozone) concentration when A/C flies profiles - Size
- Telescope dome 8" OD (hemisphere) atop 5" H
pedestal. (Total H 9" above A/C skin), Inside
A/C 12" D x 18" H cylinder. - Weight
- 131.6 lbs
4Note MODIS RGB images, with MODIS AOD maps
overlaid for every J-31 flight available at
http//geo.arc.nasa.gov/sgg/INTEX-B/
Acknowledgements appreciated.
5Full spectrum AOD measurements, AATS vs. MODIS-
Terra in INTEX-B, 2006
AOD
Wavelength (mm)
6Full spectrum AOD measurements, AATS vs. MODIS-
Aqua in INTEX-B, 2006
AOD
Wavelength (mm)
7AOD Comparisons, MODIS - AATS Gulf of Mexico,
INTEX-B/MILAGRO, 2006
MODIS-Terra (March 5, 10, 12)
MODIS-Aqua (March 10, 17)
37 cells
18 cells
Over ocean, 98 of MODIS-Terra near-IR (1243-2119
nm) aerosol optical depth (AOD) values differed
from airborne sunphotometer (AATS) values by lt
the estimated uncertainty, 0.03 0.05AOD. For
MODIS-Aqua the was 100. These s exceed the
66 expected if 0.03 0.05AOD is 1s.
8AOD Comparisons, OMI - MODIS - AATS INTEX-B/MILAGR
O, 2006
OMI
9AOD Comparisons, OMI - MODIS - AATS INTEX-B/MILAGR
O, 2006
OMI
MODIS
10AOD Comparisons, OMI - MODIS - AATS INTEX-B/MILAGR
O, 2006
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13Does the good agreement between MODIS and AATS
AOD warrant vicarious validation of OMI with
MODIS?
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18AOD Comparisons, MISR - MODIS - AATS Gulf of
Mexico, INTEX-B/MILAGRO, 2006
19AOD Comparisons, MISR - MODIS - AATS Gulf of
Mexico, INTEX-B/MILAGRO, 2006
20AATS-14 AOD ? extinction profiles INTEX-B/MILAGRO,
2006
21AATS-14 AOD ? extinction profiles INTEX-B/MILAGRO,
2006
- Date UT
altitude latitude range longitude
range dir - hr
km deg
deg - ---------------- -------------
--------------- -----------------
-------------------- ---- - 03-Mar-2006 18.10 18.40 0.160 4.668 21.991
22.178 -97.353 -97.261 des - 03-Mar-2006 19.78 19.91 0.482 3.356 19.172
19.594 -96.360 -96.204 des - 05-Mar-2006 16.20 16.34 0.151 3.272 19.296
19.449 -95.556 -95.441 des - 05-Mar-2006 17.05 17.14 0.634 2.537 20.197
20.366 -95.576 -95.404 asc - 05-Mar-2006 17.67 17.77 0.579 3.026 19.149
19.473 -96.093 -95.948 des - 06-Mar-2006 16.99 17.18 2.497 4.849 19.393
19.499 -99.167 -99.063 des - 06-Mar-2006 18.41 18.68 0.025 6.133 19.107
19.524 -96.887 -96.188 des - 10-Mar-2006 15.40 15.70 1.739 4.945 19.286
19.615 -95.863 -94.973 asc - 10-Mar-2006 15.80 16.15 0.087 5.063 19.652
19.752 -94.946 -94.673 des - 10-Mar-2006 16.70 17.00 0.084 4.945 20.907
21.058 -94.040 -93.960 asc - 10-Mar-2006 17.80 18.02 0.025 5.418 19.136
19.490 -96.189 -95.598 des - 10-Mar-2006 19.42 19.60 0.202 3.758 19.219
19.299 -95.555 -95.482 des - 11-Mar-2006 16.24 16.52 0.739 5.261 19.054
19.548 -96.874 -96.197 asc - 11-Mar-2006 18.52 18.75 0.785 5.555 19.107
19.179 -96.281 -96.139 des - 12-Mar-2006 17.85 18.00 0.058 3.428 20.695
21.104 -96.750 -96.618 asc - 13-Mar-2006 16.35 16.70 0.040 5.393 21.033
21.128 -97.057 -96.913 des
22Summary/Conclusions
- AATS-14 INTEX-B data set is very mature and the
latest version is archived future changes will
likely only affect singular data points at high
altitude would require fine-combing by hand - Validation for MODIS (-Terra -Aqua) well
underway major finding is exceptionally good
agreement and appreciable AOD at SWIR - Validation of OMI, both the UV algorithm (Torres)
as well as the multi-wavelength algorithm (KNMI)
well underway major finding, relatively poor
agreement with AATS so far - Aerosol extinction profiles work not yet funded
have preliminary screening of suitable AOD
profiles - collecting suggestions for special
case studies to come up with a list of
priorities - Collaboration with other J-31 sensors is in its
starting phase - Future plans (partially dependent on positive
funding news) increase collaboration with other
J-31 sensors process extinction profiles look
at fine-scale AOD retrievals near clouds.