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Augmented Satellite Launch Vehicle

Retired Indian small-lift launch vehicle

Summary

Retired Indian small-lift launch vehicle

Field	Value
image	ASLV_Launch.jpeg
caption	ASLV liftoff
height	23.5 m
mass	41000 kg
diameter	1 m
manufacturer	ISRO
function	Small-lift launch vehicle
country-origin	India
location	400 km LEO
kilos	150 kg
status	Retired
first	24 March 1987
last	4 May 1994
launches	4
success	1
fail	2
partial	1
sites	Satish Dhawan Space Centre
family	SLV, PSLV
payloads	SROSS
type	stage
stageno	First
engines	2 solid
thrust	502.6 kN each
SI	253 isp
burntime	49 seconds
fuel	Solid
type	stage
stageno	Second
engines	1 solid
thrust	702.6 kN
SI	259 isp
burntime	45 seconds
fuel	Solid
type	stage
stageno	Third
engines	1 solid
thrust	304 kN
SI	276 isp
burntime	36 seconds
fuel	Solid
type	stage
stageno	Fourth
engines	1 solid
thrust	90.7 kN
SI	277 isp
burntime	45 seconds
fuel	Solid
type	stage
stageno	Fifth
engines	1 solid
thrust	35 kN
SI	281 isp
burntime	33 seconds
fuel	Solid

|country-origin = India

The Augmented Satellite Launch Vehicle (ASLV) was a small-lift launch vehicle five-stage solid-fuel rocket developed by ISRO to place 150 kg satellites into LEO. This project was started by India during the early 1980s to develop technologies needed for a payload to be placed into a geostationary orbit. Its design was based on Satellite Launch Vehicle. ISRO did not have sufficient funds for both the Polar Satellite Launch Vehicle programme and the ASLV programme at the same time and the ASLV programme was terminated after the initial developmental flights. The payloads of ASLV were Stretched Rohini Satellites.

Vehicle

The ASLV was a five-stage vehicle. Two strap-on boosters acted as a first stage, with the core stage igniting after booster burn out. The payload capacity of the ASLV was approximately 150 kg to an orbit of 400 km with a 47-degree inclination.

At liftoff, the ASLV generated 92,780 kgf of thrust. It was a 41,000 kg rocket, measuring 23.5 m in length with a core diameter of 1 m. The height to diameter ratio of ASLV was very large which resulted in the vehicle being unstable in flight. This was compounded by the fact that many of the critical events during a launch like the core ignition and the booster separation happened at the Tropopause where the dynamic loads on the launcher was at the maximum. The aerodynamic characterization research was conducted at the National Aerospace Laboratories' 1.2m Trisonic Wind Tunnel Facility.

History

The ASLV made four launches, of which one was successful, two failed to achieve orbit, and a third achieved a lower than planned orbit which decayed quickly. The type made its maiden flight on 24 March 1987, and its final flight on 4 May 1994.

Launch history

All four ASLV launches occurred from the ASLV Launch Pad at the Sriharikota Range. For vertically integrated ASLV, many SLV-3 ground facilities were reused but a new launch pad with retractable Mobile Service Structure was constructed within the same launch complex.

Flight No.	Date / time (UTC)	Rocket,	Launch site	Payload	Payload mass	Orbit	User	Launch
outcome	D1	D2	D3	D4
url=https://www.planet4589.org/space/log/launchlog.txt	first=Jonathan	last=McDowell	work=Jonathan's Space Page	title=Launch Log	access-date=19 December 2011}}	ASLV	Satish Dhawan Space Centre	SROSS-A	150 kg
First stage failed to ignite after launch
13 July 1988	ASLV	Satish Dhawan Space Centre	SROSS-B	150 kg
Control problems caused launcher to disintegrate
20 May 1992	ASLV	Satish Dhawan Space Centre	SROSS-C	106 kg			url=http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/sross3.html	title = Stretched Rohini Satellite Series 3 & C2}}
Orbit lower than expected and incorrect spin-stabilization. Decayed quickly.
url=https://www.isro.gov.in/launchers/list-of-aslv-launches	title=List of ASLV Launches	access-date=January 8, 2019	archive-date=January 8, 2019	archive-url=https://web.archive.org/web/20190108200736/https://www.isro.gov.in/launchers/list-of-aslv-launches	url-status=dead }}	ASLV	Satish Dhawan Space Centre	SROSS-C2	113 kg

Launch statistics ==

;Decade-wise summary of ASLV launches:

Decade	Successful	Partial success	Failure	Total
1980s	0	0	2	2
1990s	1	1	0	2
Total	1	1	2	4

References

"ASLV".
"Space Launch Vehicles - ASLV".
Menon, Amarnath. (15 April 1987). "Setback in the sky". India Today.
"ASLV".
Mukunth, Vasudevan. "U.R. Rao, Former Chairman Who Helped ISRO Settle Down".
(2022-06-06). "Bengaluru: 1.2m trisonic wind tunnel at National Aerospace Laboratories completes 55 years of service".
Indian Space Research Organization. (2015). "From Fishing Hamlet to Red Planet: India's Space Journey". Harper Collins.
McDowell, Jonathan. "Launch Log". Jonathan's Space Page.
"Stretched Rohini Satellite Series 3 & C2".
"List of ASLV Launches".

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

space-programme-of-india satish-dhawan-space-centre isro-space-launch-vehicles expendable-space-launch-systems vehicles-introduced-in-1987

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