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PSLV-C1 - Revision history
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{{Infobox spaceflight<br />
| name = PSLV-C1<br />
| image = PSLV.svg<br />
| image_caption = Model of the [[Polar Satellite Launch Vehicle|PSLV]] rocket<br />
| image_size = 70px<br />
<br />
| mission_type = Deployment of one [[satellite]]<br />
| operator = [[Indian Space Research Organisation|ISRO]]<br />
| COSPAR_ID = <br />
| SATCAT = <br />
| website = [http://www.isro.gov.in/ ISRO website]<br />
| mission_duration = 1090.52 seconds<br />
<br />
| spacecraft = [[Polar Satellite Launch Vehicle]]<br />
| spacecraft_type = [[Launch vehicle]]<br />
| spacecraft_bus = <br />
| manufacturer = [[Indian Space Research Organisation|ISRO]]<br />
| launch_mass = {{cvt|294000|kg}}<br />
| payload_mass = {{cvt|1250|kg}}<br />
| dimensions = <br />
| power = <br />
<br />
| launch_date = 29 September 1997, 04:47 [[Coordinated Universal Time|UTC]]<br />
| launch_rocket = [[Polar Satellite Launch Vehicle|PSLV]]<br />
| launch_site = [[Satish Dhawan Space Centre|Sriharikota Launching Range]]<br />
| launch_contractor = [[Indian Space Research Organisation|ISRO]]<br />
<br />
| orbit_reference = [[Geocentric orbit]]<br />
| orbit_regime = [[Sun-synchronous orbit]]<br />
| orbit_periapsis = <br />
| orbit_apoapsis = <br />
| orbit_inclination = 98.7° <br />
| apsis = gee<br />
<br />
| payload_items = [[IRS-1D]]<br />
<br />
| insignia = <br />
| insignia_caption = <br />
| insignia_size = 200px<br />
<br />
| programme = '''[[Polar Satellite Launch Vehicle#Launch history|Polar Satellite Launch Vehicle missions]]'''<br />
| previous_mission = '''[[PSLV-D3]]'''<br />
| next_mission = '''[[PSLV-C2]]'''<br />
}}<br />
<br />
'''PSLV-C1''' was the overall fourth mission of the [[Polar Satellite Launch Vehicle]] (PSLV) program by [[Indian Space Research Organisation]] (ISRO). The vehicle carried [[IRS-1D]] satellite which was deployed in the [[Sun-synchronous orbit]] (SSO).<ref name="PSLV-C1">{{cite news|title=PSLV-C1|publisher=Indian Space Research Organisation|access-date=24 Jun 2016|url=http://www.isro.gov.in/launcher/pslv-c1}}</ref><ref name="PSLV-C1 brochure">{{cite news|title=PSLV-C1 brochure|publisher=Indian Space Research Organisation|access-date=24 June 2016|url=http://www.isro.gov.in/sites/default/files/pdf/pslv-brochures/PSLVC1.pdf}}</ref><ref name="PSLV">{{cite news|url=http://www.spacelaunchreport.com/pslv.html|title=PSLV|publisher=Space Launch Report|access-date=24 June 2016}}</ref><ref name="ISRO Timeline">{{cite news|title=ISRO Timeline|publisher=Indian Space Research Organisation|access-date=24 June 2016|url=http://www.isro.gov.in/about-isro/isros-timeline-1960s-to-today#39}}</ref> This was India's first launch vehicle built without Russian assistance and PSLV's first operational flight placed [[IRS-1D]] into a [[polar orbit]]. However, it could not place the satellite in the desired circular orbit but in an elliptical orbit due to a leak of helium gas from one of the components. The mission was termed partial failure since the satellite could not be placed at the desired altitude.<ref name="Space">{{cite news |title=Space|publisher=digitaltoday.in|access-date=24 June 2016|url=http://archives.digitaltoday.in/indiatoday/13101997/space.html}}</ref><ref name="PSLV fail">{{cite news|title=PSLV fail |publisher=spacelaunchreport.com|access-date=24 June 2016|url=http://www.spacelaunchreport.com/slvfail.txt}}</ref><br />
<br />
== Mission parameters ==<br />
* '''Mass''':<br />
** ''Total liftoff weight:'' {{cvt|294000|kg}}<br />
** ''Payload weight:'' {{cvt|1250|kg}}<br />
<br />
* '''Overall height''': {{cvt|44.4|m}}<br />
<br />
* '''Propellant''': <br />
** ''Stage 1:'' [[Solid-fuel rocket|Solid]] [[Hydroxyl-terminated polybutadiene|HTPB based]]<br />
** ''Stage 2:'' [[Liquid fuel rocket|Liquid]] [[UH 25]] + {{N2O4}}<br />
** ''Stage 3:'' [[Solid-fuel rocket|Solid]] [[Hydroxyl-terminated polybutadiene|HTPB based]]<br />
** ''Stage 4:'' [[Liquid fuel rocket|Liquid]] [[Monomethylhydrazine|MMH]] + [[Mixed oxides of nitrogen|MON-3]]<br />
<br />
* '''Altitude''': {{cvt|826|km}}<br />
<br />
* '''Maximum velocity''': {{cvt|7436|m/s}} (recorded at time of fourth stage cut-off)<br />
<br />
* '''Inclination''': 98.7°<br />
<br />
* '''Period''': 1090.52 seconds <ref name="PSLV-C1 brochure"/><br />
<br />
== Launch ==<br />
PSLV-C1 was launched at 04:47 [[Coordinated Universal Time|UTC]] on 29 September 1997 from [[Satish Dhawan Space Centre]] (then called "Sriharikota Launching Range"). The vehicle placed the [[IRS-1D]] satellite in the [[Sun-synchronous orbit]].<ref name="PSLV-C1"/><ref name="PSLV-C1 brochure"/><ref name="PSLV"/><ref name="ISRO Timeline"/><ref name="Space"/><br />
<br />
== See also ==<br />
* [[Indian Space Research Organisation]]<br />
* [[Polar Satellite Launch Vehicle]]<br />
<br />
== References ==<br />
{{Reflist|30em}}<br />
<br />
{{Portal bar|India|Science|Space|Spaceflight}}<br />
{{PSLV}}<br />
{{Indian space programme}}<br />
{{Expendable launch systems}}<br />
<br />
[[Category:Spacecraft launched in 1997]]<br />
[[Category:Polar Satellite Launch Vehicle]]</div>
Ajay Kumar