Oceansat

Oceansat

1. A SEMINAR ON OCEANSAT AND ITS APPLICATIONS

2. Contents Introduction Sattelite Ocean Sat Types of Ocean Sat Oceansat-1 Oceansat-2 Oceansat-3 Applications Applications in various fields Conclusions References

3. Satellite: An object revolving around the earth in an orbit . It covers large area of information. Satellites can travel around planets or around stars. Introduction

4. Fig:- Process of Oceansat

5. CARTOSAT - 1 PAN - 2.5M, 30 KM, F/A RESOURCESAT-1 LISS-III - 23 M; 4 XS LISS-IV - 5.8 M; 3-XS AWIFS - 70 M; 4-XS CARTOSAT-2 PAN - 1M MEGHA-TROPIQUES SAPHIR SCARAB & MADRAS 2003 2004 2005 2005 IRS-1C (1995) LISS-III (23/70M), STEERABLE PAN (5.8 M); WiFS (188M) IRS-1D (1997) LISS-III (23/70M, STEERABLE PAN (5.8 M); WiFS (188M) IRS-P2 (1994) LISS-II IRS-P3 (1996) WiFS, MOS X-Ray, IRS-P4 (1999) OCEANSAT OCM (360m), MSMR IRS-1A & 1B ( 1988 & 91) LISS-1&2 (72/36M, 4 BANDS; VIS & NIR) IRS SERIES

6. OCEAN-SAT IRS-P4 (OCEANSAT) is the first satellite primarily built for Ocean applications. Weight - 1050 kg. Orbit - 720 km. Placed in a Polar Sun Synchronous launched by PSLV-C2 from SHAR Centre, Sriharikota on May 26, 1999.  OceanSat 1 AND 2 Both is built for Ocean applications. It carries two Payloads: Ocean Color Monitor (OCM) and Multi-frequency Scanning Microwave Radiometer (MSMR). OCM provides valuable data which are used for various applications both within India and by International users.

7. Contd… OCM data built for atmospheric correction data regarding Chlorophyll concentration, total suspended matter (TSM), estimation of primary productivity, detection of algal blooms, atmospheric vertical profiles of temperature, pressure and humidity, wind fields over ocean surface, sea state, Ocean dynamics , and bio-physical parameters. It will be equipped with three payload: OCM, Scatterometer and ROSA. OCM was also present on OCEANSAT-I, Scatterometer and ROSA are new instruments.

8. Oceansat 1:- This satellite carries Ocean Colour Monitor (OCM) and a Multi - frequency Scanning Microwave Radiometer (MSMR) for oceanographic studies. IRS-P4 thus vastly argument the IRS satellite system of ISRO comprising four satellites, IRS-1B, IRS-1C, IRS-P3 and IRS-1D and extend remote sensing applications to several newer areas. It carries two payloads Ocean Colour Monitor (OCM) Multi-frequently Scanning Microwave Radiometer (MSMR) Mission completed on August 8, 2010 after serving for 11 years and 2 months

9. History; Oceansat-1 was launched by ISRO's PSLV-C2 on 26 May 1999 from the First Launch Pad of Satish Dhawan Space Centre in Sriharikota, India. It was the third successful launch of PSLV. It was the 8th satellite of the IRS satellite series of India. Payloads Ocean Colour Monitor (OCM):- It is a solid state camera literally designed primarily to monitor the colour of the ocean, thereby useful for documenting chlorophyll concentration, phytoplankton blooms, atmospheric aerosols . Multi-frequently Scanning Microwave Radiometer (MSMR):- It collects data by measuring microwave radiation passing through the atmosphere over the ocean. This offers information including sea surface temperature, wind speed, cloud water content, and water vapour content.

10. Detail Of Oceansat-1 Launch date May 26, 1999 Launch site SHAR, Sriharikota Launch vehicle PSLV - C2 Orbit Polar Sun Synchronous Altitude 720 km Inclination 98.28 deg Period 99.31 min Local time of Eq. crossing 12 noon Repetitivity cycle 2 days Size 2.8m x 1.98m x 2.57m Mass at lift off 1050 kg Length when fully deployed 11.67 m Attitude and Orbit Control 3-axis body-stabilised using Reaction Wheels, Magnetic Torquers and Hydrazine Thrusters Power 9.6 Sq.m Solar Array generating 750w Two 21 Ah Ni- C d Battries Mission Completed On August 8, 2010

11. Ground resolution[m] Real time mode[full resolution mode] :- 360[across-track] 236[along-track] 2. Swath[km] :- 1420 Specifications of IRS-P4 OCM[ocean sat 1]

12. Oceansat-2 Launched by PSLV-C14 from Satish Dhawan Space Centre, Sriharikota on Sept. 23, 2009. It carries three payloads: Ocean Colour Monitor (OCM) Ku-band Pencil Beam scatterometer (SCAT) developed by ISRO Radio Occultation Sounder for Atmosphere (ROSA) developed by the Italian Space Agency. Oceansat-2 is envistigated to provide continuity of operational services of Oceansat-1(IRS-P4) with enhanced application potential .

13. History ; The scientific payload contains three instruments. Two are Indian and one is from the Italian Space Agency. Payloads Ocean Colour Monitor (OCM)  - OCM is a 8-band multi-spectral camera operating in the Visible – Near IR spectral range. This camera provides an instantaneous geometric field of view of 360 meter and a swath of 1420 km. Scanning Scatterometer (SCAT)  - SCAT is an active microwave device designed and developed at ISRO/SAC, Ahmedabad. It will be used to determine ocean surface level wind vectors through estimation of radar backscatter. By using two offset feeds at the focal plane of the antenna, two beams are generated which will conically scan the ground surface. Radio Occultation Sounder for Atmospheric Studies (ROSA)  - ROSA is a new GPS occultation receiver provided by ISA (Italian Space Agency). The objective is to characterize the lower atmosphere and the ionosphere, opening the possibilities for the development of several scientific ,new radio occultation data sets.

14. Detail Of Oceansat-2 Launch date Sept 23, 2009 Launch site SHAR, Sriharikota Launch vehicle PSLV - C14 Orbit Polar Sun Synchronous Altitude 720 km Inclination 98.28° Period 99.31 minutes Local time of Eq. crossing 12 noon ± 10 minutes Repetitivity cycle 2 days Size OCM, SCAT and ROSA Mass at lift off 960 kg Power 15 Sq.m Solar panels generating 1360W, Two 24 Ah Ni- Cd Battries Mission Life 5 years

15. Chlorophyll distribution at Bay of Bengal (India)

16. Specifications of Oceansat-2 OCM 1. Ground Resolution (m) :- : 360 (across-track) : 236(across-track) 2. Swath (km) : : 1420

17. OCEANSAT-3: It carries Thermal IR Sensor, channel Ocean Color Monitor, Scatterometer and Passive Microwave Radiometer. IR Sensor and Ocean Color Monitor would be used in the analysis for operational Potential Fishing Zones. Satellite is mainly for Ocean biology and sea state applications. It is slated to the launched aboard PSLV in 2012-13.

18. Data Quality The quality of the data products issued by the wind component (negligible error) is smaller than 2 m/s and a bias of less than 0.5 m/s in wind speed .

19. Applications Using Oceansat 50 km wind product can been validated by comparing the scatterometer retrievals with that of ocean surface wind. The assessment of the Oceansat data reveals that the data quality is promising and that an initial processing issue which prevents a proper wind computation in locations with low winds has now been much improved. A wind product distribution is available for within 10 minutes after the input data in the reception and the output will be available for the user within 1 to 1.5 hour. All obtained values can be corrected in a fairly simple way. The performance of the products issued by the wind component (negligible error) is smaller than 2 m/s and a bias of less than 0.5 m/s in wind speed.

20. Applications in Various fields Sea-state forecast: waves, circulation and ocean MLD (Mixed Layer Depth) Monsoon and cyclone forecast - medium and extended range Observation of Antarctic sea ice Fisheries and primary production estimation Detection and monitoring of phytoplankton blooms Study of sediment dynamics Potential Fishing Zone Advisories Ocean State Forecasting Ocean and coastal studies

21. Conclusions OceanSat 1 AND 2 Both is built for Ocean applications. Oceansat 2 Is a technically improved version of ocean sat 1. IR Sensor and Ocean Color Monitor would be used in the analysis for operational Potential Fishing Zones. Weather scientists will have an opportunity to study advanced meteorological and oceanographic applications over the oceanic regions around India even under cloudy conditions

22. References 2006, Anji Reddy.M, A Text book of Remote Sensing and Geographical Information System, B.S.Publications, 3 rd Edition, , Pp: 109-115 . 1985,HaroldL.Levin,PhysicalGeology,Saunderscollege(Mexico city Riode Janeioro Madrid )publications, 2 nd addition, Pp:450-453 http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/1-what-is-an-orbit.html http://www.isro.org/satellites/irs-p4_oceansat.aspx  http://www.isro.org/rep2005/EOS.htm http://overseasindian.in/2009/april/news/20092004-113702.shtml

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