risat isro


IRNSS-1F UPDATE: Fourth LAM firing of IRNSS-1F, for 78.8 sec has been successfully completed on 14.3.2016 starting from 11:42:44 hr (IST). Preparations for Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of PS4 are under progress, Mono Methyl Hydrazine (MMH) propellant filling operation of fourth stage (PS4) of PSLV-C32 is commenced at 12:30 (IST) and is under progress, The 54hr 30min countdown activity of PSLV-C32/IRNSS-1F Mission has started at 09:30hr IST today, Tuesday, March 8, 2016, PSLV-C32/IRNSS-1F UPDATE: Mission Readiness Review (MRR) committee and Launch Authorisation Board (LAB) have cleared the 54 and half hr countdown starting at 09:30hr IST on Tuesday, March 8, 2016 and the launch for March 10, 2016, Media Registration for PSLV-C32/IRNSS-1F Launch, CE 20 Engine of GSLV MKIII successfully hot tested.

Media Registration for PSLV-C29/TeLEOS MISSION, Media Registration for PSLV-C29/TeLEOS-1 MISSION, Framing of the Recruitment Rules for the post of Director,Physical Research Laboratory,Ahmedabad-Regarding, GSAT-15 Update: Station acquisition maneuvers for GSAT-15 were completed and s/c is successfully collocated at 93.5 deg E during night of Nov. Countdown will commence from 05.58 Hrs IST on 28th November, 2018. 25). Launch of PSLV-C29 carrying six satellites of Singapore is scheduled at 6:00 pm on Dec 16, 2015 . The characterization of the system itself was unique, where all the 126 beams have been characterized with precision. The third and final orbit raising operation of GSAT-29 satellite has been successfully carried out today (November 17, 2018) by firing the Liquid Apogee Motor (LAM) engine of the satellite at 0957 Hrs IST for a duration of 207 sec, GSLV Mk III-D2/GSAT-29 Mission: The second orbit raising operation of GSAT-29 satellite has been successfully carried out today (November 16, 2018) by firing the Liquid Apogee Motor (LAM) engine of the satellite at 1027 Hrs IST for a duration of 4988 sec, GSLV Mk III-D2 / GSAT-29 Mission: The first orbit raising operation of GSAT-29 satellite has been successfully carried out today (15th November) by firing the Liquid Apogee Motor (LAM) engine of the satellite at 0834 Hrs IST for a duration of 4875 seconds.

The flexible digital chirp generator provides the expanded pulses of four different bandwidths of 225, 75, 37.5 and 18.75 MHz for operation in the various imaging modes. The spacecraft structure is designed to meet the stiffness, strength and pointing requirements of the payload, sensors and also confining the overall bus volume within the launch vehicle envelope. Hybrid Polarimetric SAR image generation from the RISAT-1 SAR data is the other major capability utilized by interested scientists and researchers. • On April 27-28, 2012 the spacecraft's propulsion system was used in 4 orbital maneuvers to raise the altitude to its nominal 536 km near-circular orbit. The mechanical configuration of the complete antenna, grouped into three panels per twelve tiles, and a detailed view of the basic tile structure, are shown in Figure 28. The first orbit raising manoeuver of GSAT-7A satellite has been successfully carried out today (20th December) by firing the Liquid Apogee Motor (LAM) engine of the satellite at 0916 Hrs IST for a duration of 3895 seconds. Performanc is normal, Heat Shield Seperated. The carrier generation section, QPSK modulator section, filter units, and the selection of the main and redundant chain units are identical in all the chains, as the frequency of operation and modulation schemes is identical. N2O4 tank filling and UH25 tank filling operations of Second Stage (PS2) of PSLV-C37 are completed. Propellant filling operations of Second Stage (PS2) are completed.

Many operational modes and the hybrid polarimetric capabilities of RISAT-1 are expected to open up newer avenues, as it provides many more observable parameters like amplitude, phase and state of polarization, enabling many new scientific studies leading to diverse and novel applications using microwave data (Ref. The other operational spaceborne SAR instruments like on Radarsat-2, TerraSAR-X or COSMO Skymed, are equipped with specific linear polarimetric mode which is usually operated within the restricted coverage of 20° to 30° incidence angle, because of doubling of PRF (Pulse Repetition Frequency) and usually a specific imaging mode is dedicated for linear polarimetric operation. In each tile, all the 24 x 24 radiating elements are grouped into 24 groups, each group consisting of 24 elements spread along azimuth directions which are fed by two stripline distribution networks feeding for V and H polarization. HSFC RECRUITMENT - AS THE COVID-19 PANDEMIC SITUATION STILL PREVAILS, THE FRESH DATES FOR CONDUCT OF WRITTEN EXAMINATION HAVE NOT BEEN FINALIZED.

Spacecraft health checks and preparations for propellant filling operation of second stage (PS2) of PSLV-C34 are under progress. During LEOP (Launch and Early Orbit Phase), initial and normal phases were provided from the MOX/ISTRAC of Bangalore. PSLV has three variants, namely, PSLV – the generic version with six regular strap-on motors (S9), PSLV–CA – the core alone version without strap-on motors and the more powerful PSLV-XL with S12 strap-on motors (S12 is the extended version of the regular S9 strap-ons in terms of length and propellant loading). Automatic Launch Sequence (ALS) program initiation authorised by Vechicle Director and ALS started for launch of PSLV-C38/Cartosat2 Series Satellite mission at 09:17 hr IST. The cylinder also provides interface for the propellant tank and reaction wheel deck. Mission Director has authorised Vehicle Director for launch. About 27 test cases, including on-board calibration operations were exercised during the in-orbit commissioning of SAR payload. During monsoon periods and also for the regions which are perennially under cloud cover, RISAT will be the sole source of data when operational. The planned 4 orbital maneuvers used 37 kg of on-board fuel to reach the nominal orbit of 536.6 km.

The SAR antenna and the solar array are stowed during the launch and are deployed in the orbit in order to meet the constraints imposed by the launch vehicle.

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