Ajay Kumar at 07:47, 2 September 2023

2023-09-02T07:47:31Z

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{{Short description|Indian Earth observation satellite}}
{{Use British English|date=May 2020}}
{{Use dmy dates|date=May 2020}}
{{Infobox spaceflight
| name = IRS-P3
| names_list = Indian Remote Sensing satellite-P3
| image =
| image_caption =
| image_size = 300px
| mission_type = [[Earth observation satellite|Earth observation]]
| operator = [[Indian Space Research Organisation|ISRO]]
| COSPAR_ID = 1996-017A
| SATCAT = 23827
| website = https://www.isro.gov.in/
| mission_duration = 3 years (planned) 8.5 years (achieved)
| spacecraft = IRS-P3
| spacecraft_type =
| spacecraft_bus = [[IRS-1A]]
| manufacturer = Indian Space Research Organisation
| launch_mass = {{cvt|922|kg}}
| dry_mass = {{cvt|838|kg}}
| dimensions = 1.56 m x 1.66 m x 1.10 m
| power = 873 [[Watt|watts]]
| launch_date = 21 March 1996, 04:53 [[Coordinated Universal Time|UTC]]
| launch_rocket = [[Polar Satellite Launch Vehicle]], [[PSLV-D3]]
| launch_site = [[Satish Dhawan Space Centre]], first launch pad
| launch_contractor = Indian Space Research Organisation
| entered_service = June 1996 <ref name="WMO"/>
| disposal_type =
| deactivated = 15 October 2004
| last_contact =
| orbit_reference = [[Geocentric orbit]]
| orbit_regime = [[Sun-synchronous orbit]]
| orbit_periapsis = {{cvt|802|km}}
| orbit_apoapsis = {{cvt|848|km}}
| orbit_inclination = 98.69°
| orbit_period = 101.4 minutes
| apsis = gee
| instruments = Multispectral Opto-electronic Scanner (MOS) Indian X-ray Astronomy Experiment (IXAE) Wide-Field Sensor (WiFS)
| programme = [[Earth observation satellite|Earth observation satellites series]]
| previous_mission = [[IRS-1C]]
| next_mission = [[IRS-1D]]
}}

== History ==
IRS-P3 was a remote sensing satellite launched by ISRO on board of [[Polar Satellite Launch Vehicle]] (PSLV) launch vehicle for [[remote sensing]] of [[Earth]]'s [[Natural resource|natural resources]]. It also hosted a scientific instrument, the Indian X-ray Astronomy Experiment (IXAE), for the study of [[X-ray astronomy]]. The IRS-P3 satellite contained an X-ray astronomy instrument, a [[C band (IEEE)|C-band]] [[Transponder (satellite communications)|transponder]] and two remote sensing instruments. IRS-P3 was one of the satellite in the [[Indian Remote Sensing Programme]] of [[Earth observation satellite]]s, assembled, launched and maintained by Indian Space Research Organisation. There was no data recording device on board of the IRS-P3 and data was transmitted in real-time to the [[ground station]]d in [[Hyderabad]], [[India]] and [[Neustrelitz]], [[Germany]].<ref name="IOCCG">{{cite web|url=https://www.ioccg.org/reports/mos/mos.html|title=A Spaceborne Imaging Spectrometer for Ocean Remote Sensing|publisher=International Ocean Colour Coordinating Group (IOCCG)|date=May 1997|access-date=13 May 2021}}</ref>

== Instruments ==
IRS-P3 carried two remote sensing instruments and one X-ray astronomy experiment:

* Modular opto-electronic scanner (MOS),<ref>{{cite web|url=https://www.isro.org/satellites/irs-p3.aspx|title=IRS-P3|publisher=[[Indian Space Research Organisation]]|access-date=2013-02-02|archive-date=17 October 2014|archive-url=https://web.archive.org/web/20141017004440/http://www.isro.org/satellites/irs-p3.aspx|url-status=dead}}</ref> which was provided by [[German Aerospace Center]] (DLR), in the framework of a cooperative agreement between ISRO and DLR. MOS was designed for ocean remote sensing.<ref name="Science">{{cite journal |last1=Thyagarajan |first1=K. |last2=Neumann |first2=A. |last3=Zimmermann |first3=G. |date=November–December 1996 |title=The IRS-P3 remote sensing mission |url=https://www.sciencedirect.com/science/article/abs/pii/S0094576597000532 |journal=[[Acta Astronautica]] |volume=39 |issue=9–12 |pages=711–716 |bibcode=1996AcAau..39..711T |doi=10.1016/S0094-5765(97)00053-2 |access-date=13 May 2021}}</ref>

* '''Indian X-ray astronomy experiment''' ('''IXAE'''). IXAE was to study the time variability and spectral characteristics of [[X-ray astronomy|cosmic X-ray sources]] and for detection of transient X-ray sources. The experiment was developed by [[U R Rao Satellite Centre|ISRO Satellite Centre]] (URSC) and [[Tata Institute of Fundamental Research]] (TIFR). The experiment was intended to study periodic and aperiodic intensity variation in galactic/extragalactic X-ray, spectral characteristics of various sources and properties of newly discovered X-ray transients. IXAE instruments consisted of three identical pointed mode proportional counters (PPCs) operated in the energy range 2-20 [[Electronvolt|keV]], [[Field of view|FOV]] of 2° x 2° and [[Aperture (antenna)#Effective area|effective area]] of 1200 cm2, and an X-ray sky monitor (XSM) operating in the energy range 2-10 keV.

* Wide-field sensor (WiFS) with additional Short-Wave Infrared band (SWIR). The sensor was designed for vegetation dynamic studies.

== Launch ==
IRS-P3 was launched by the [[PSLV-D3]] [[launch vehicle]] on 21 March 1996, at 04:53 [[Coordinated Universal Time|UTC]], from [[Satish Dhawan Space Centre]], [[Sriharikota]], India. Periodic calibration of [[Polar Satellite Launch Vehicle]] tracking radar was located at tracking stations.

== Mission ==
The mission was completed on 15 October 2004 after serving for 8.5 years.<ref name="WMO">{{cite web|url=https://www.wmo-sat.info/oscar/satellites/view/irs_p3|title=IRS-P3|publisher=[[World Meteorological Organization]]|date=28 July 2015|access-date=13 May 2021}}</ref> With the consecutive successful launches of the PSLV, it was decided not to plan any more [[Augmented Satellite Launch Vehicle]] (ASLV) missions.<ref name="Yuga">{{cite web |url=http://spaceyuga.com/pslv-polar-satellite-launch-vehicle/|archive-url=https://web.archive.org/web/20120207035425/http://spaceyuga.com/pslv-polar-satellite-launch-vehicle/|url-status=dead|title=Polar Satellite Launch Vehicle|publisher=Space Yuga|archive-date=7 February 2012|access-date=13 May 2021}}</ref>

== See also ==
{{Portal|Spaceflight}}
* [[Indian Remote Sensing]]

== References ==
{{Reflist|30em}}

== External links ==
* [http://www.isro.org/satellites/irs-p3.aspx ISRO IRS-P3 link]

{{IRS satellites}}
{{Indian spacecraft}}
{{Orbital launches in 1996}}

[[Category:Earth observation satellites of India]]
[[Category:Spacecraft launched in 1996]]
[[Category:1996 in India]]

IRS-P3 - Revision history

Ajay Kumar at 07:47, 2 September 2023