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: IDROSC@coas.oregonstate.edu

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