jasmine s. nahorniak mark r. abbott ricardo m. letelier curt vandetta bridges to the community nasa...
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Jasmine S. NahorniakMark R. AbbottRicardo M. LetelierCurt Vandetta
Bridges to the Community
NASA grant NNG05GA73GInternational EOS/NPP Direct Broadcast Meeting 2005
The stations are ideal candidates to act as regional learning centers.
Direct broadcast stations act as a bridge between real-time satellite data and the user community.
We have a responsibility to provide accurate documentation, instruction, and support.
Roadmap
A case study: • The OSU direct broadcast station • Major software transition• User impact
Bridging the gap• Educating the community• Regional Learning Centers
The Oregon State UniversityThe Oregon State UniversityDirect Broadcast StationDirect Broadcast Station
• located in Corvallis, Oregon on the west coast of the United States
• operational since February 2001
• satellite data are collected from MODIS (TERRA and AQUA)
Station objectives:
• collect, process, and disseminate real-time MODIS oceans data
• all data (real-time and archived) freely available online, by ftp, and by subscription
• user-friendly data access
http://picasso.coas.oregonstate.edu/ORSOO/MODIS/DB/
orbitdata
oceansmetdata
oceansSSTdata
Key:
SUN
SGI
PC
Linux
1
2
3
4
12:00
12:30
14:00
GSC &browser
PC
PC
passcollection
Linux
SUN
L1bL2 oceansreal-time
SGI
outsideusers
camera
ftpserver
webserver
database
ERSDEM2
Linux
main scripts,RT-STPS,
GBADSUN
reprocessing
SGI
Early 2004:
MODIS science team restructured
TERRA MODIS processing suspended
oceans code responsibility transferred from the University of Miami to the Ocean Color team (NASA)
Implications for direct broadcast:
TERRA MODIS processing not fully supported
major software change
orbitdata
oceansmetdata
oceansSSTdata
Key:
SUN
SGI
PC
Linux
1
2
3
4
12:00
12:30
14:00
GSC &browser
PC
PC
passcollection
Linux
SUN
L1bL2 oceansreal-time
SGI
outsideusers
camera
ftpserver
webserver
database
ERSDEM2
Linux
main scripts,RT-STPS,
GBADSUN
reprocessing
SGI
Processing Level
Level 0Raw data converted into a time-ordered set of packets (PDS)
Level 1bCalibrated radiances at 36 wavebands
Level 2Ocean products at 1 km resolution (not mapped)
Level 3Daily equal-area maps of ocean products
ImagesThumbnails and larger images representing the data
Processing Level
raw 0
0 1b
1b 2
2 3
images
Software (platform)
RT-STPS - NASA (SUN)and GBAD – NASA (SGI)
MODIS Level 1 Processing Software for Direct Broadcast
Data - NASA (SGI)
MODIS ocean data processing code – University of Miami (SGI)
MS2GT, SIMAP, IDL,ENVI, Matlab (SUN)
Original configuration
Processing Level
raw 0
0 1b
1b 2
2 3
images
Software (platform)
RT-STPS - NASA (Linux)and GBAD - NASA (Linux)
SeaDAS - NASA (Linux)
New configuration
Processing Level
raw 0
0 1b
1b 2
2 3
images
Software (platform)
RT-STPS - NASA (SUN)and GBAD - NASA (SGI)
MODIS Level 1 Processing Software for Direct Broadcast
Data - NASA (SGI)
MODIS ocean data processing code – University of Miami (SGI)
MS2GT, SIMAP, IDL,ENVI, Matlab (SUN)
Original configuration
Software (platform)
RT-STPS - NASA (Linux)and GBAD - NASA (Linux)
SeaDAS - NASA (Linux)
New configuration
Pros:
Compatible with NASA
Simple installation and updates
Easier to implement
Runs on Linux PCs (less expensive than SUN/SGI)
No software licenses required
Simplifies processing
The TransitionThe Transition
Cons:
Requires complete overhaul ofthe processing system
TERRA MODIS oceans processing supported but not validated
Output filenames, formats, and contents are different than before
Data users will be affected
Original files New files
Impact on our data users:
Filename change
File contents change
File sizes and spatial coverage change
New algorithms
TERRA MODIS not validated
How do we ease transitions like this?
Users need access to:
Accurate, online documentation
Technical support
Software tools
Training classes
The Bridge
What have we learned from our users?
large data files
excessive documentation
software tools provided
consistency (data files, software, different satellites)
online instruction (documentation, teaching modules)
online discussion groups with prompt replies http://ocforum.gsfc.nasa.gov
different users have different needs
This 2-day workshop attracted 40 participants from across the United States as well as Canada, Peru, Chile, and the United Kingdom.
A combination of talks and hands-on-tutorials covering a variety of software tools.
The itinerary focused on the file formats, contents, and software for viewing and manipulating the data.
The information presented in the 2003 workshop is now largely obsolete – a repeat workshop should be organized, focusing on the new file formats.
What did we learn from the workshop?
Many attendees wanted to know:“Which software should I use?”
• a wide variety of software is available for data processing
• users were confused and intimidated by the variety of choice
Different users have different needs:
• some want to create pretty pictures
• others want in-depth knowledge of the data and software
• it is difficult to cater to both types of user at a single workshop
Suggestions for future workshops
Cater workshops to different types of users (basic vs. advanced)
Hold workshops at / near direct broadcast stations
Customize the workshops to topics of regional interest
Yearly or biennial workshops
EOS direct broadcast stations are currently located at 101 locations in 28 countries.
The stations at these disperse locations are ideal for acting as regional learning centers.
Pros:
Globally distributed
Main data users usually local
Station technicians know more about their data than anyone
Incorporate regional environmental issues
Outreach to the community
Attract more researchers, better research, and funding
Regional Learning CentersRegional Learning Centers
Cons:
Each workshop must be custom-made
Someone has to organize it!
Conclusion
A major software transition in progress at the Oregon State University direct broadcast station, brought issues of user impact to the forefront.
The utilization of existing direct broadcast stations as regional learning centers would both serve the needs of the users as well as provide a forum for public outreach.
Acting as bridges between satellite data and the scientific community, direct broadcast stations should play a larger role in educating the public.
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