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- EROS-B is a high-resolution commercial imaging minisatellite mission of ImageSat International N.V. headquartered in the Netherlands Antilles (Cayman Islands), with offices in Limassol, Cyprus, and in Tel Aviv, Israel. The overall objective is to provide high-resolution imagery to the customer base. Spacecraft: The EROS-B series S/C structure is identical to that of EROS-A, based on the Ofeq platform of Israel's Defense Ministry, and designed and built by Israel Aircraft Industries Ltd. (IAI/MBT). The deployed S/C structure is 2.3 m high and 4.0 m wide. The S/C is is 3-axis stabilized and the light/rigid design of the EROS satellite family allows for a great degree of platform agility. The spacecraft is very agile, a body-pointing capability of ±45º from nadir is provided in all directions, supporting the daily data acquisition plan. The S/C attitude is sensed and controlled as done with EROS-A. In addition, there is a star sensor for the B satellite series. The nominal S/C design life is six years. The nominal S/C launch mass is ~290 kg; however, additional onboard fuel (up to 60 kg) is sufficient for S/C operations of up to 10 years. This increased the spacecraft launch mass to about 350 kg. Orbit: Sun-synchronous circular orbit, mean altitude = 500 km, inclination = 97.4º, local time of descending node (LTDN) at 14:00 hours. - Note: The orbits of EROS-A and EROS-B are phased in the same orbital plane thereby increasing the revisit time of the constellation. Launch: A launch of EROS-B took place on April 25, 2006 on a Start-1 launch vehicle from the Svobodny Cosmodrome in eastern Siberia (location at: 51.4º N, 128.3º E). 3) RF communications: Imagery is transmitted in X-band at a rate of 280 Mbit/s (downlink) to the ground receiving stations, using a 1.5 W transmitter and one of the two existing two-axis gimbaled directional antennas. The EROS satellites are monitored/operated in S-Band (TT&C) via a single ground control station (GCS), located at IAI/MBT in Israel (3 to 4 passes per day and per satellite are in station visibility). The S-band data rate is either 2.5 or 15 kbit/s selectable by the GCS. ImageSat has a global network of ground segment infrastructure, for real-time image data acquisition. This network is comprised of the ImageSat Central Ground Control Station, a network of EROS-compatible Ground Receiving Stations on 5 continents and EROS-compatible Ground Control Stations based at exclusive customers' premises. Sensor complement: (PIC-2) PIC-2 (Panchromatic Imaging Camera-2), designed and developed by ElOp (Electro Optical Industries) of Rehovot, Israel, a subsidiary of Elbit Systems Ltd. The EROS-B series imager instrument features CCD pushbroom technology in combination with a TDI (Time Delay Integration) scheme in its focal plane, a cumulative expose concept of each ground image line by a CCD detector array, to improve the SNR value (an important issue for high-resolution imaging). The instrument uses also a Cassegrain telescope with an aperture of 50 cm in diameter and a focal length of 5 m (folded optics). FOV = 1.5º. The PIC-2 instrument is rigidly mounted to the S/C structure looking into the nadir direction, thus permitting a body-pointing observation scheme. he CCD pushbroom detector array provides 10,000 pixels per line and a total of 96 lines for selectable TDI observation support. Pushbroom scanning is provided for panchromatic imagery only in the spectral range of 0.5 - 0.9 μm. The ground sampling distance (GSD) is 0.70 m, the swath width is 7 km at nadir. The data is quantized at 10 bit/sample. The imager instrument of EROS-B spacecraft can be operated in either asynchronous or in synchronous imaging mode. In synchronous mode, the S/C platform keeps a constant pointing angle toward the Earth's surface. In asynchronous mode, imaging by the detector array is performed in a "step-and-stare" fashion, i.e., by slewing the S/C platform in the along-track direction (this permits in particular the generation of mosaics as well as the support of stereo imaging of targets of interest). Information obtained from http://www.eoportal.org/
Group: Platform_Details Entry_ID: EROS-B1 Group: Platform_Identification Platform_Category: Earth Observation Satellites Short_Name: EROS-B1 End_Group Group: Platform_Associated_Instruments Short_Name: CAMERAS End_Group Group: Orbit Orbit_Altitude: 500 Orbit_Inclination: 97.4 Period: 94.7 Perigee: 503.5 Apogee: 514.7 Orbit_Type: LEO > Low Earth Orbit > Polar Sun-Synchronous End_Group Creation_Date: 2008-07-09 Online_Resource: http://directory.eoportal.org/get_announce.php?an_id=12460 Group: Platform_Logistics Launch_Date: 2006-04-25 Launch_Site: Svobodny Cosmodrome, Russia Design_Life: 10 years Primary_Sponsor: ImageSat International, Israel End_Group End_Group
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