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#160
by
Steven Pietrobon
on 28 Sep, 2015 05:12
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IPSC? Director.
Minister for Science and Technology.
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#161
by
Steven Pietrobon
on 28 Sep, 2015 05:14
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The person who started the Atsrosat program. Former ISRO chairman.
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#162
by
abhishek
on 28 Sep, 2015 05:19
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No mention of RLV in the speech ? is it happening this year or not ?
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#163
by
Steven Pietrobon
on 28 Sep, 2015 05:19
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"This is the way to do it."
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#164
by
Steven Pietrobon
on 28 Sep, 2015 05:23
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Complete IRNSS by March next year. GSAT 15 on the way to Korou.
Webcast has ended.
Congratulations to ISRO and India for the successful launch!
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#165
by
Steven Pietrobon
on 28 Sep, 2015 05:25
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Full replay of launch.
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#166
by
isro-watch
on 28 Sep, 2015 05:27
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Very surprised, both the ISRO Chairman and SDSC-SHAR Director did not mention any date/month for the next PSLV mission !
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#167
by
isro-watch
on 28 Sep, 2015 05:30
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Also, Did the satellites achieve orbital velocity ? Wasn't 7Km/s lower than the planned 7.5 Km/s ? But the orbit seemed OK 650x649 with 6 degree incl
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#168
by
Ohsin
on 28 Sep, 2015 05:34
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No mention of RLV in the speech ? is it happening this year or not ?
In an article from few days ago Dr K Sivan said it would happen by this year end. Lets see if post launch press questions get any details.
Edit:
With the successful deployment of four Lemur-2 cubesats we became the first US cubesats to ever launch from India
Today, we are raising our glasses to LEMUR2-PETER, LEMUR2-JOEL, LEMUR2-JEROEN, and LEMUR2-CHRIS.
https://spire.com/insights/news/first-commercial-weather-satellite-network/
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#169
by
worldtimedate
on 28 Sep, 2015 07:30
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ISRO launches ASTROSAT, first space observatory
Besides NASA, space agencies of the European Union, Japan and Russia have launched similar facilities into the space.
With the Monday's launch, ISRO has successfully crossed the half century mark as for foreign satellites. ISRO has launched 51 satellites for foreign satellites so far.
The 1,513 kg-weighing cuboid-shaped satellite would be eventually fine-tuned into 650 km above the Earth’s surface.
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#170
by
vineethgk
on 28 Sep, 2015 13:15
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#171
by
vyoma
on 28 Sep, 2015 15:28
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Press release:
http://www.isro.gov.in/update/28-sep-2015/pslv-successfully-launches-india%E2%80%99s-multi-wavelength-space-observatory-astrosatSep 28, 2015
PSLV Successfully Launches India’s Multi Wavelength Space Observatory ASTROSAT
In its thirty first flight (PSLV-C30) conducted today (September 28, 2015), India's Polar Satellite Launch Vehicle successfully launched ASTROSAT, the country's Multi Wavelength Space Observatory along with six foreign customer satellites into a 644.6 X 651.5 km orbit inclined at an angle of 6 deg to the equator. The achieved orbit is very close to the intended one. This was the thirtieth consecutive success for PSLV.
PSLV was launched today in its heaviest ‘XL’ version with six strap-on motors of the first stage. The launch took place from the First Launch Pad at the Satish Dhawan Space Centre SHAR (SDSC SHAR), Sriharikota, the spaceport of India.
The 320 tonne, 45 m tall PSLV-C30 carrying seven satellites including the 1513 kg ASTROSAT, lifted off at 10:00 Hrs IST. About twenty two minutes after lift-off, ASTROSAT was successfully placed in orbit and separated from the fourth stage of PSLV-C30. The separation of all the six co-passenger satellites was completed in the subsequent three minutes. The seven satellites carried by PSLV-C30 together weighed about 1631 kg at lift-off.
After a 50 hour smooth count down, the 320 ton PSLV-C28 was launched with the ignition of its first stage. The important flight events included the ignition and separation of the strap-ons, separation of the first stage, ignition of the second stage, separation of the payload fairing after the vehicle had cleared the dense atmosphere, second stage separation, third stage ignition and third stage separation, fourth stage ignition and fourth stage cut-off.
Through 30 successful flights during 1994-2015 period, PSLV has launched a total of 84 satellites including the seven satellites successfully launched today. The vehicle has repeatedly proved its reliability and versatility by successfully launching satellites into a variety of orbits including polar Sun Synchronous, Geosynchronous Transfer and Low Earth orbits of small inclination thereby emerging as the workhorse launch vehicle of India.
So far, 51 satellites have been launched by PSLV for customers from abroad. Today’s launch of six co-passenger satellites by PSLV-C30 was facilitated by Antrix Corporation Limited, the commercial arm of the Indian Space Research Organisation (ISRO), a government of India Company under the Department of Space (DOS).
Soon after its separation from PSLV-C30, the two solar arrays of ASTROSAT were automatically deployed and the Spacecraft Control Centre at the Mission Operations Complex of ISRO Telemetry, Tracking and Command Network (ISTRAC) at Bangalore took control of ASTROSAT.
ASTROSAT is India’s first dedicated multi wavelength space observatory. This scientific satellite mission endeavours for a more detailed understanding of our universe. ASTROSAT is designed to observe the universe in the Visible, Ultraviolet, low and high energy X-ray regions of the electromagnetic spectrum simultaneously with the help of its five payloads.
ASTROSAT was realised by ISRO with the participation of all major astronomy institutions including Inter University Centre for Astronomy and Astrophysics (IUCAA) of Pune, Tata Institute of Fundamental Research (TIFR) at Mumbai, Indian Institute of Astrophysics (IIAP) and Raman Research Institute (RRI) of Bangalore as well as some of the Universities in India and two institutions from Canada and the UK.
In the coming days, ASTROSAT will be brought to the final operational configuration and all its five scientific payloads will be thoroughly tested before the commencement of regular operations.
Today’s successful flight of PSLV further underscores the reliability and versatility of PSLV as well as the robustness of its design.
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#172
by
input~2
on 29 Sep, 2015 16:47
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INTLDES NORAD_CAT_ID SATNAME PERIOD (min) INCL(°) APOGEE (km) PERIGEE (km)
2015-052H 40937 PSLV R/B 97.28 5.96 649 608
2015-052A 40930 OBJECT A 97.55 5.99 650 633
2015-052B 40931 OBJECT B 97.54 6.00 650 632
2015-032C 40932 OBJECT C 97.52 6.01 650 630
2015-052D 40933 OBJECT D 97.51 6.00 650 630
2015-052E 40934 OBJECT E 97.56 6.01 650 634
2015-052F 40935 OBJECT F 97.57 6.00 650 635
2015-052G 40936 OBJECT G 97.58 6.00 650 635
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#173
by
vineethgk
on 29 Sep, 2015 18:44
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Launch photos
Correction: Apparently the third photo posted above was not of Astrosat launch as it appear to show the Second Launch Pad. The ISRO link has taken it down now.
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#174
by
s^3
on 30 Sep, 2015 18:01
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PSLV C30 launched all the satellites in near equatorial orbit of 6 deg inclination.
Good for ASTROSAT but all other piggybacks will now have to spend some extra fuel to bring themselves in their planned polar orbits.
A heavy price for piggybacking
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#175
by
zubenelgenubi
on 30 Sep, 2015 20:03
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#176
by
baldusi
on 30 Sep, 2015 21:33
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Unless they intend to demonstrate some incredible propulsion method, they will work on the equatorial orbit. You need two times the orbital delta-v to go from equatorial to SSO.
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#177
by
jcm
on 02 Oct, 2015 22:28
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BTW, the four Lemur satellites are named this way:
LEMUR-2-JOEL
LEMUR-2-PETER
LEMUR-2-JEROEN
LEMUR-2-CHRIS
Haven't seen this discussed anywhere, but I infer the sats are named after senior people at Spire namely
Joel Spark, Peter Platzer, Jeroen Cappaert and (probably) Chris Wake.
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#178
by
Steven Pietrobon
on 03 Oct, 2015 07:52
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Unless they intend to demonstrate some incredible propulsion method, they will work on the equatorial orbit. You need two times the orbital delta-v to go from equatorial to SSO.
I believe you need a delta-v of about sqrt(2)*vo = 1.41*7.8 = 11 km/s, not twice your orbital speed.
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#179
by
baldusi
on 03 Oct, 2015 15:13
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Unless they intend to demonstrate some incredible propulsion method, they will work on the equatorial orbit. You need two times the orbital delta-v to go from equatorial to SSO.
I believe you need a delta-v of about sqrt(2)*vo = 1.41*7.8 = 11 km/s, not twice your orbital speed.
SSO is 97 deg circular, the insertion orbit was 6 deg circular. That's orthogonal vectors. If you thrust to the diagonal, then yes, you can do it with 1.41 the Vo. You are right. I did a simple sum without taking advantage of the cosine. In small plane changes it sort of plays the other way around.
