2013-03-22

Az LDCM (leendő Landsat 8) első nyílvános felvételei



Mai postánkból. John Faundeen (USGS EROS Data Center) küldte az imént a CEOS WGISS tagoknak és összekötőknek:

First Images Released From Newest Earth Observation Satellite


Posted: 21 Mar 2013 09:01 AM PDT
WASHINGTON -- NASA and the Department of the Interior's U.S. Geological Survey (USGS) have released the first images from the Landsat Data Continuity Mission (LDCM) satellite, which was launched Feb. 11.
The natural-color images show the intersection of the United States Great Plains and the Front Range of the Rocky Mountains in Wyoming and Colorado. In the images, green coniferous forests in the mountains stretch down to the brown plains with Denver and other cities strung south to north.
LDCM acquired the images at about 1:40 p.m. EDT March 18. The satellite's Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) instruments observed the scene simultaneously. The USGS Earth Resources Observation and Science Center in Sioux Falls, S.D., processed the data.
"We are very excited about this first collection of simultaneous imagery," said Jim Irons, LDCM project scientist at NASA's Goddard Space Flight Center in Greenbelt, Md. "These images confirm we have two healthy, functioning sensors that survived the rigors of launch and insertion into Earth orbit."
Since launch, LDCM has been going through on-orbit testing. The mission operations team has completed its review of all major spacecraft and instrument subsystems, and performed multiple spacecraft attitude maneuvers to verify the ability to accurately point the instruments.
The two LDCM sensors collect data simultaneously over the same ground path. OLI collects light reflected off the surface of Earth in nine different regions of the electromagnetic spectrum, including bands of visible light and near-infrared and short-wave-infrared bands, which are beyond human vision. TIRS collects data at two longer wavelength thermal infrared bands that measure heat emitted from the surface.
By looking at different band combinations, scientists can distinguish features on the land surface. These features include forests and how they respond to natural and human-caused disturbances, and the health of agricultural crops and how much water they use. Data from LDCM will extend a continuous, 40-year-long data record of Earth's surface from previous Landsat satellites, an unmatched, impartial perspective that allows scientists to study how landscapes all across the world change through time.
"These first scenes from the new Landsat satellite continue the remarkable output from the Landsat program with better, more useful imagery and information," said Matthew C. Larsen, associate director for climate and land use change at the U.S. Geological Survey in Reston, Va. "We are gratified that this productive partnership between USGS and NASA has maintained the continuity and utility of this essential satellite tool, providing the foundation for land and water management around the globe."
As planned, LDCM currently is flying in an orbit slightly lower than its operational orbit of 438 miles (705 kilometers) above Earth's surface. As the spacecraft's thrusters raise its orbit, the NASA-USGS team will take the opportunity to collect imagery while LDCM is flying under Landsat 7, also operating in orbit. Measurements collected simultaneously from both satellites will allow the team to cross-calibrate the LDCM sensors with Landsat 7's Enhanced Thematic Mapper-Plus instrument.
"So far, our checkout activities have gone extremely well," said Ken Schwer, LDCM project manager at Goddard. "The mission operations team has done a tremendous job getting us to the point of imaging Earth." During the next few weeks, this team will calibrate the instruments and verify they meet performance specifications.
After its checkout and commissioning phase is complete, LDCM will begin its normal operations in May. At that time, NASA will hand over control of the satellite to the USGS, which will operate it throughout its planned five-year mission life. The satellite will be renamed Landsat 8. USGS will process data from OLI and TIRS and add it to the Landsat Data Archive at the USGS Earth Resources Observation and Science Center, where it will be distributed for free via the Internet.
Visit LDCM First Images to view the images.
For further information about LDCM, visit LDCM Mission.
For status and technical information about all Landsat satellites, visit Landsat Missions.
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2013-03-13

Az EUROGI SDI bevizsgálási módszertant adaptálják Olaszországban

Mai postánkból. Franco Vico (EUROGI/eSDI-Net Initiative Portfolio leader) írja:
"...as briefly mentioned in the last EUROGI General Board Meeting (October 9th, Dublin), AMFM has the prospect of using SDI Self-Assessment-Framework (SDI-SAF) in next months for the analysis of Italian regional SDIs.
You remember that SDI-SAF was developed in the context of EUROGI/eSDI-Net Initiative as a tool for describing and making comparable sub-national SDIs across Europe. It makes sense to maintain and update this tool.
In October-November 2012 a draft updated version of SDI-SAF was prepared and distributed to all EUROGI members, asking for comments. No comments were received back (if I remember well). Now, after the winter and while spring is coming, and it is approaching the possibility of using SDI-SAF again, it make sense to finalize SDI-SAF updating.
In attach you find the draft SDI-SAF, against which I ask you to comment (note: likely you already have these files!).
I am waiting for your suggestions and comments. I will take them into consideration if I'll receive them by March 27.
Yesterday you received an e-mail on "Participation to INSPIRE 2013  WS" from Mauro Salvemini: that mail and this one refer both substantially to the same issue, maintaining EUROGI/eSDI-Net flag flying in in the near future."

Háttérdokumentum: www.hunagi.hu/G/pub/EU/SDI-SAFdatamodel.pdf

2013-03-08

Formálódó jegyzék a szabadon felhasználható, Magyarország területére eső térinformatikai adatokról

HUNAGI hozzájárulás az OSGEO Hungary Interest Group Linkedin fórumának munkájához. Részlet a Fórum számára ma írt megjegyzésből:
"HUNAGI blogjában akár mától kész linket adni Siki tanár úr által már összegyűjtött a szabadon felhasználható, Magyarország területére eső térinformatikai adatokat tartalmazó weboldalára: http://www.agt.bme.hu/gis/qgis/.
Egy következő lépésben lehetséges lenne a HUNAGI honlapjának előoldalán (www.hunagi.hu) szervezetfüggetlen módon biztosítani egy ilyen szolgáltatás megjelenítését, főleg, ha az OSGEO Hungary Interest Goup részéről és nevében lesz aki azt gondozza. Ma estére több példát is mutatok az ENSZ világából a hunagi8.blogspot.com -on, ahol ilyen rendszereket előszeretettel alkalmaznak illetve felhasználnak."

Kiegészítő megjegyzések:
1) Dr.Siki Zoltán, tagszervezetünk a BME ÁGT  tagszervezeti összekötője
2) A múlt heti UNGIWG ülésen bemutatott rendszerek rövid bemutatása a HUNAGI Napló március elsjei bejegyzésében találhatóak.