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Direct. Broadcast. Jasmine Nahorniak Oregon State University. What is Direct Broadcast ?. D ata streamed in real-time from the satellite to the earth as soon as the data are collected. NASA. What is Direct Readout ?. - PowerPoint PPT PresentationTRANSCRIPT
Direct Jasmine Nahorniak
Oregon State University
Broadcast
What is Direct Broadcast?
NASA
Data streamed in real-time from the satellite to the earth as soon as the data are collected.
What is Direct Readout?Data collected by a satellite dish in real-time from a satellite travelling overhead.
Ocean sensors with direct broadcast
MODISVIIRSAVHRROCM-2POLDER 3
COCTS CZI MERSIMVISRVIRR
NASA image
http://directreadout.sci.gsfc.nasa.gov/?id=dspContent&cid=78
Worldwide Direct Readout Sites
Image from the NASA Direct Readout website
North American Direct Readout Sites
http://directreadout.sci.gsfc.nasa.gov/?id=dspContent&cid=78Image from the NASA Direct Readout website
Oregon State UniversityDirect Broadcast Station
Station Coverage
Aqua MODIS May 24 2013
1:52 pm
12:17 pm
3:30 pm
Terra MODIS May 24 2013
12:08 pm 10:32 am
1:47 pm
How is this different from “normal” data?
NASA image
NASA Aqua Example• Aqua circles the earth 14 times a day.• Data for an entire orbit is stored on the satellite
and then dumped down to two main ground stationsas the satellite passes over them:
Poker Flat, Alaska Svalbard, Norway• An entire orbit of data is then sent to NASA for processing.
These data are not available in real-time.
Direct Broadcast Normal
TimelinessAccuracyNo costGlobal coverageMapped, L3 dataData archiveStandard products
Why use direct broadcast data?
• pollution monitors• oil spill cleanup• research vessels• search and rescue• natural disaster monitoring• fisheries and aquaculture?
Who needs ocean direct broadcast data?
For more information ....
International Direct Readout Ocean Steering CommitteeJasmine Nahorniak (OSU), Ricardo Letelier (OSU), Frank Muller-Karger (USF), Ichio Asanuma (TUIS, Japan), Edward King (CSIRO, Australia), Marcelo Colazo (CONAE, Argentina)e-mail: [email protected]
Community Websiteoceandirectreadout.org
OSU Direct Broadcast StationMODIS (SeaDAS): http://sugar.coas.oregonstate.edu/MODIS/MODIS (IPOPP): http://sugar.coas.oregonstate.edu/MODIS/IPOPP/
support for direct broadcast data
NASA Direct Readout Laboratory (DRL)http://directreadout.sci.gsfc.nasa.gov/Patrick Coronado, Kelvin Brentzel
• a voice for the direct readout community• source of information• develop software for direct readout data processing
• e.g. IPOPP: International Polar Orbiter Processing Package
The NASA DRL is seeking input from end-users of ocean satellite data
to determine possible future directions.
MODIS AQUA May 31, 2013 collected at OSU
Do you currently use direct broadcast data?
How is direct broadcast data useful to your field?
Can it be improved?
Discussion: Direct Broadcast