Data Changes from GOES-12/NOP Imagers

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Data Changes from GOES-12/NOP Imagers
Timothy J. Schmit NOAA/NESDIS/STAR (formerly
ORA) SaTellite Applications and Research (STAR)
Advanced Satellite Products Team (ASPT) in
collaboration with the Cooperative Institute for
Meteorological Satellite Studies (CIMSS) Madison,
WI
Satellite Direct Readout Users Conference for the
Americas 12 December 2002
UW-Madison
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Data Changes from GOES-12/NOP Imagers
X-ray image of the Sun was taken by the SXI
instrument onboard
GOES-12
GOES-12 Imager Changes - Spectral -
Spatial GOES-N/O/P Changes - Less outages
http//www.sec.noaa.gov/sxi/
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sample high spectral-resolution earth emitted
spectra
Spectral ranges for the GOES-8/11 (top bars) and
GOES-12 (bottom bars) Imagers.
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GOES Imager bands
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GOES Imager 6.7 um vs 6.5 um
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GOES Imager Bands 4, 5, 6
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GOES-8 Imager data -- native perspective
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GOES-12 Imager data -- native perspective
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GOES-12 Imager comparisons
The improved spatial resolution on the water
vapor images from GOES-12 are evident (4 km
detectors, as opposed to the 8 km detectors).
After accounting for spectral response
differences, the imager brightness temperatures
are similar to those from operational satellites.
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(No Transcript)
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GOES-8/12 Imager comparisons
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GOES-10
GOES-12
Both water vapor images are shown in their native
projections.
http//cimss.ssec.wisc.edu/goes/misc/011119/011119
.html
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Average satellite brightness temperatures
measured over the mountain wave signature region
were about 3 degrees K warmer on GOES-12 than on
GOES-10/08.
The GOES-12/10/08 weighting functions calculated
from the 19 September 00UTC Albuquerque NM
rawinsonde profile, the theoretical water vapor
channel brightness temperatures should have been
about 3.5 degrees warmer on GOES-12 than on
GOES-10/08.
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GOES-12 Imager -- Visible
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GOES-12 Imager -- IR window
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GOES-12 Imager -- 13.3 µm
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GOES-12 Imager -- Cloud Top Pressure
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GOES-12 Sounder -- Cloud Top Pressure
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Expected product changes
Note Most GOES Imager data or products are not
affected by these changes (most imagery,
infrared-only products, visible products, etc).
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Expected product changes
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GOES Imager spatial resolution characteristics.
(GOES-8/11 values are from Menzel and Purdom 1994)
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Limitations of Current GOES Imagers

• Regional/Hemispheric scan conflicts
• Low spatial resolution
• Missing spectral bands
• Eclipse and related outages

GOES-N/O/P will supply data through the eclipse
periods. The spacecraft batteries are specified
to be large enough to run through
eclipse. Shields have been added to the
secondary mirror spiders.
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Outages due to Eclipse and the Keep-Out-Zone
No data!
GOES-8 (3 hours of data outage)
GOES-N (0 hours of data outage)
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GOES-O improved spatial resolution of the 13.3
um band.
1 km
2 km
4 km
8 km
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More information NWA article Schmit, T. J.,
E. M. Prins, A. J. Schreiner, and J. J. Gurka,
2001 Introducing the GOES-M imager. Volume 25,
Nos 3,4, Nat. Wea. Assoc. Digest. GOES-12 web
pages http//cimss.ssec.wisc.edu/goes/g12_report/
http//www.cira.colostate.edu/ramm/goesm/test_resu
lts.htm GOES spectral response functions and
GOES-M changes http//www.oso.noaa.gov/goes/goes
-calibration/change-channels.htm COMET page on
GOES channels http//meted.ucar.edu/satmet/goesch
an/index.htm SXI and space weather
http//www.sec.noaa.gov/sxi/ GOES-12 Imager
VISITview session (and a NOAA Technical Memo) are
being developed.