What is OCM data?
OCM is a solid state camera used to collect data on chlorophyll concentration, detect and monitor phytoplankton blooms and obtain data on atmospheric aerosols and suspended sediments in water. It operates in eight spectral bands — visible and near-Infra Red region — of the electromagnetic spectrum.
Which bands are used for atmospheric correction of OCM data?
The spectral bands at 768nm and 867nm are used in atmospheric correction procedures. The OCM instrument mounted on IRS-P4 will be launched by PSLV and placed in a polar sunsynchronous 720 kilometer altitude orbit.
What is the spatial resolution of OCM data?
The two modes of OCM data transmission are real-time and playback. The playback mode provides a coarser spatial resolution of 2.16 km. The data are averaged onboard (8 scan lines x 4 pixels) and transmitted in the eclipse phase of the orbit at a rate of 0.3 Mbit/s.
When was ISRO’s first ocean Colour program started *?
Oceansat-2 was launched from Satish Dhawan Space Centre, First Launch Pad (FLP) on 23 September 2009, at 06:21 UTC using the Polar Satellite Launch Vehicle (PSLV-C14). India successfully launched its 16th remote-sensing satellite Oceansat-2 and six nano European satellites in 1200 seconds.
What spectral band is used for AOD retrieval?
412 nm band
The 412 nm band is sometimes referred to as the “deep blue” band, from which the algorithm gets its name. AOD retrieval in the 412 nm band allows for increased spatial coverage relative to tthe Dark Target algorithm, which makes different assumptions which are not valid over bright surfaces such as deserts.
How big an area is a single Landsat Oli image?
OLI is a pushbroom sensor that operates in the visible (VIS) and short wave infrared (SWIR) spectral regions. It has a swath width of 185-kilometer (115 mi), which means it can image the entire Earth over a repeating cycle of 16 days.
What is the use of Insat satellite?
The INSAT system with more than 200 transponders in the C, Extended C and Ku-bands provides services to telecommunications, television broadcasting, satellite newsgathering, societal applications, weather forecasting, disaster warning and Search and Rescue operations.
What is the history of remote sensing?
The history of remote sensing begins with photography. The origin of other types of remote sensing can be traced to World War II, with the development of radar, sonar, and thermal infrared detection systems. Since the 1960s, sensors have been designed to operate in virtually all of the electromagnetic spectrum.
How is AOD measured?
Aerosol optical depth (AOD) is the measure of aerosols distributed within a column of air from the instrument or Earth’s surface to the top of the atmosphere. In this paper, we compared the AOD measured by the Raymetrics Lidar system and AERONET sunphotometer.
How is AOD calculated?
Aerosol Robotic Network (AERONET) is a global network of ground-based sun photometers. These sun photometers are able to calculate the AOD and amount of water vapor in the atmosphere by comparing the amount of light they detect with the amount of solar radiation which would be observed in an aerosol-free atmosphere.
What is OLI and TIRS?
The Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) are instruments onboard the Landsat 8 satellite, which was launched in February of 2013. Two thermal bands (TIRS) capture data with a minimum of 100 meter resolution, but are registered to and delivered with the 30-meter OLI data product.
