Author Topic: LIVE: PSLV C38 - Cartosat-2E & 30 nanosats - June 23, 2017 (03:59 UTC)  (Read 76515 times)

Offline mtakala24

It can also be debated whether this is the first real Finnish satellite, as the QB-50 satellites are registered to the Netherlands regardless of their country of origin. But Horray! gotta wake up early tomorrow :)

Offline jcm

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The list of other satellites are

Aalto 1

Horray for the first Finnish satellite. Getting the ride to orbit after the second Finnish satellite already got deployed *and* stopped working (Aalto 2 got to ISS on the Cygnus, was deployed and few weeks later ended up no longer responding to commands)

Was originally booked on Falcon 9 along with Formosat, but moved to this rocket after SpaceX delays due to certain unfortunate event that kinda wrecked the schedule last autumn.


"few weeks later.." For the historical record do you happen to know when exactly Aalto 2 stopped working? I would say Aalto 2 was the first Finnish
satellite (even if it will be UN-registered by Belgium).

Good luck with Aalto-1.
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Offline Skyrocket

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It can also be debated whether this is the first real Finnish satellite, as the QB-50 satellites are registered to the Netherlands regardless of their country of origin. But Horray! gotta wake up early tomorrow :)

Aalto-1 is not part of QB50.

Offline Skyrocket

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"few weeks later.." For the historical record do you happen to know when exactly Aalto 2 stopped working? I would say Aalto 2 was the first Finnish
satellite (even if it will be UN-registered by Belgium).

Good luck with Aalto-1.

According to their website, the problem arose 4 days after deployment. Not sure, when it finally stopped.

Offline Jarnis

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Okay, then I heard about it late.

http://spacecraft.aalto.fi/en/current/news/2017-06-12/

Looks like they have not declared it as a total loss yet, but if they don't hear from it soon...

Here's hoping Aalto-1 fares better even if it gets there fashionably late.
« Last Edit: 06/22/2017 03:54 pm by Jarnis »

Offline vineethgk

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http://m.economictimes.com/news/defence/indias-eye-in-the-sky-for-defence-forces-to-get-sharper-wider/articleshow/59272180.cms

Quote
HYDERABAD: India's 'eye in the sky' is set to become sharper and wider with the launch of a third spacecraft in Cartosat-2 series -- a dedicated satellite for defence forces -- from the Sriharikota spaceport tomorrow.
Quote
The previous satellite in the series had a resolution of 0.8 metres. The latest remote sensing satellite slated to be launched on board PSLV-C38 tomorrow morning has a resolution of 0.6 metres, which means it can spot even smaller objects.
Quote
"It can recognise objects within that square (0.6 m by 0.6 m)", an ISRO official told PTI on condition of anonymity.
Quote
Once this satellite becomes operational, it would be "handed over" to the defence forces, which have their own "set up," including ground-stations and trained manpower to access data.
Quote
On the need to have a third satellite in the series, the official said, "The revisit time is the one which determines your data accessibility. More the number of satellites, the better and shorter revisit time you will have and more data you will get."
« Last Edit: 06/22/2017 03:51 pm by vineethgk »

Offline vineethgk

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Quote
Mobile Service Tower (MST) withdrawal to parking end is completed. Preparations for propellant filling operation of Second Stage (PS2) are in progress
Source

Offline Star One

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http://m.economictimes.com/news/defence/indias-eye-in-the-sky-for-defence-forces-to-get-sharper-wider/articleshow/59272180.cms

Quote
HYDERABAD: India's 'eye in the sky' is set to become sharper and wider with the launch of a third spacecraft in Cartosat-2 series -- a dedicated satellite for defence forces -- from the Sriharikota spaceport tomorrow.
Quote
The previous satellite in the series had a resolution of 0.8 metres. The latest remote sensing satellite slated to be launched on board PSLV-C38 tomorrow morning has a resolution of 0.6 metres, which means it can spot even smaller objects.
Quote
"It can recognise objects within that square (0.6 m by 0.6 m)", an ISRO official told PTI on condition of anonymity.
Quote
Once this satellite becomes operational, it would be "handed over" to the defence forces, which have their own "set up," including ground-stations and trained manpower to access data.
Quote
On the need to have a third satellite in the series, the official said, "The revisit time is the one which determines your data accessibility. More the number of satellites, the better and shorter revisit time you will have and more data you will get."

As it's a military satellite will its final orbital parameters be classified?

Offline vineethgk

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http://m.economictimes.com/news/defence/indias-eye-in-the-sky-for-defence-forces-to-get-sharper-wider/articleshow/59272180.cms

Quote
HYDERABAD: India's 'eye in the sky' is set to become sharper and wider with the launch of a third spacecraft in Cartosat-2 series -- a dedicated satellite for defence forces -- from the Sriharikota spaceport tomorrow.
Quote
The previous satellite in the series had a resolution of 0.8 metres. The latest remote sensing satellite slated to be launched on board PSLV-C38 tomorrow morning has a resolution of 0.6 metres, which means it can spot even smaller objects.
Quote
"It can recognise objects within that square (0.6 m by 0.6 m)", an ISRO official told PTI on condition of anonymity.
Quote
Once this satellite becomes operational, it would be "handed over" to the defence forces, which have their own "set up," including ground-stations and trained manpower to access data.
Quote
On the need to have a third satellite in the series, the official said, "The revisit time is the one which determines your data accessibility. More the number of satellites, the better and shorter revisit time you will have and more data you will get."

As it's a military satellite will its final orbital parameters be classified?
I'm not sure really. The report quotes an anonymous source, so there is a certain level of confusion with the intended use of this bird. Unlike the previous two 'Cartosat 2 Series' namesakes, this was often featured in many ISRO presentations (with a proper name as 'Cartosat-2E') indicating it was likely a civvie, while references to the former two were often avoided. But now this too got the official name as 'Cartosat 2 Series'.

Offline Star One

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http://m.economictimes.com/news/defence/indias-eye-in-the-sky-for-defence-forces-to-get-sharper-wider/articleshow/59272180.cms

Quote
HYDERABAD: India's 'eye in the sky' is set to become sharper and wider with the launch of a third spacecraft in Cartosat-2 series -- a dedicated satellite for defence forces -- from the Sriharikota spaceport tomorrow.
Quote
The previous satellite in the series had a resolution of 0.8 metres. The latest remote sensing satellite slated to be launched on board PSLV-C38 tomorrow morning has a resolution of 0.6 metres, which means it can spot even smaller objects.
Quote
"It can recognise objects within that square (0.6 m by 0.6 m)", an ISRO official told PTI on condition of anonymity.
Quote
Once this satellite becomes operational, it would be "handed over" to the defence forces, which have their own "set up," including ground-stations and trained manpower to access data.
Quote
On the need to have a third satellite in the series, the official said, "The revisit time is the one which determines your data accessibility. More the number of satellites, the better and shorter revisit time you will have and more data you will get."

As it's a military satellite will its final orbital parameters be classified?
I'm not sure really. The report quotes an anonymous source, so there is a certain level of confusion with the intended use of this bird. Unlike the previous two 'Cartosat 2 Series' namesakes, this was often featured in many ISRO presentations (with a proper name as 'Cartosat-2E') indicating it was likely a civvie, while references to the former two were often avoided. But now this too got the official name as 'Cartosat 2 Series'.

Does that indicate to you that it maybe a dual use satellite by both military and civilian authorities?

Offline vineethgk

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http://m.economictimes.com/news/defence/indias-eye-in-the-sky-for-defence-forces-to-get-sharper-wider/articleshow/59272180.cms

Quote
HYDERABAD: India's 'eye in the sky' is set to become sharper and wider with the launch of a third spacecraft in Cartosat-2 series -- a dedicated satellite for defence forces -- from the Sriharikota spaceport tomorrow.
Quote
The previous satellite in the series had a resolution of 0.8 metres. The latest remote sensing satellite slated to be launched on board PSLV-C38 tomorrow morning has a resolution of 0.6 metres, which means it can spot even smaller objects.
Quote
"It can recognise objects within that square (0.6 m by 0.6 m)", an ISRO official told PTI on condition of anonymity.
Quote
Once this satellite becomes operational, it would be "handed over" to the defence forces, which have their own "set up," including ground-stations and trained manpower to access data.
Quote
On the need to have a third satellite in the series, the official said, "The revisit time is the one which determines your data accessibility. More the number of satellites, the better and shorter revisit time you will have and more data you will get."

As it's a military satellite will its final orbital parameters be classified?
I'm not sure really. The report quotes an anonymous source, so there is a certain level of confusion with the intended use of this bird. Unlike the previous two 'Cartosat 2 Series' namesakes, this was often featured in many ISRO presentations (with a proper name as 'Cartosat-2E') indicating it was likely a civvie, while references to the former two were often avoided. But now this too got the official name as 'Cartosat 2 Series'.

Does that indicate to you that it maybe a dual use satellite by both military and civilian authorities?
It is my understanding that the Cartosat series in general have been considered 'dual-use' by the authorities considering their relatively hi-res imaging capabilities. So yeah, to my mind its really a question of whether it is a normal 'dual-use' Cartosat or a 'military-only' one as its two predecessors (or four considering that both 2A and 2B too have been rumoured to be dedicated for 'strategic users').

Offline vineethgk

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Offline Star One

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http://m.economictimes.com/news/defence/indias-eye-in-the-sky-for-defence-forces-to-get-sharper-wider/articleshow/59272180.cms

Quote
HYDERABAD: India's 'eye in the sky' is set to become sharper and wider with the launch of a third spacecraft in Cartosat-2 series -- a dedicated satellite for defence forces -- from the Sriharikota spaceport tomorrow.
Quote
The previous satellite in the series had a resolution of 0.8 metres. The latest remote sensing satellite slated to be launched on board PSLV-C38 tomorrow morning has a resolution of 0.6 metres, which means it can spot even smaller objects.
Quote
"It can recognise objects within that square (0.6 m by 0.6 m)", an ISRO official told PTI on condition of anonymity.
Quote
Once this satellite becomes operational, it would be "handed over" to the defence forces, which have their own "set up," including ground-stations and trained manpower to access data.
Quote
On the need to have a third satellite in the series, the official said, "The revisit time is the one which determines your data accessibility. More the number of satellites, the better and shorter revisit time you will have and more data you will get."

As it's a military satellite will its final orbital parameters be classified?
I'm not sure really. The report quotes an anonymous source, so there is a certain level of confusion with the intended use of this bird. Unlike the previous two 'Cartosat 2 Series' namesakes, this was often featured in many ISRO presentations (with a proper name as 'Cartosat-2E') indicating it was likely a civvie, while references to the former two were often avoided. But now this too got the official name as 'Cartosat 2 Series'.

Does that indicate to you that it maybe a dual use satellite by both military and civilian authorities?
It is my understanding that the Cartosat series in general have been considered 'dual-use' by the authorities considering their relatively hi-res imaging capabilities. So yeah, to my mind its really a question of whether it is a normal 'dual-use' Cartosat or a 'military-only' one as its two predecessors (or four considering that both 2A and 2B too have been rumoured to be dedicated for 'strategic users').

Do you think the obfuscation in this case is deliberate or accidental?

Offline vineethgk

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http://m.economictimes.com/news/defence/indias-eye-in-the-sky-for-defence-forces-to-get-sharper-wider/articleshow/59272180.cms

Quote
HYDERABAD: India's 'eye in the sky' is set to become sharper and wider with the launch of a third spacecraft in Cartosat-2 series -- a dedicated satellite for defence forces -- from the Sriharikota spaceport tomorrow.
Quote
The previous satellite in the series had a resolution of 0.8 metres. The latest remote sensing satellite slated to be launched on board PSLV-C38 tomorrow morning has a resolution of 0.6 metres, which means it can spot even smaller objects.
Quote
"It can recognise objects within that square (0.6 m by 0.6 m)", an ISRO official told PTI on condition of anonymity.
Quote
Once this satellite becomes operational, it would be "handed over" to the defence forces, which have their own "set up," including ground-stations and trained manpower to access data.
Quote
On the need to have a third satellite in the series, the official said, "The revisit time is the one which determines your data accessibility. More the number of satellites, the better and shorter revisit time you will have and more data you will get."

As it's a military satellite will its final orbital parameters be classified?
I'm not sure really. The report quotes an anonymous source, so there is a certain level of confusion with the intended use of this bird. Unlike the previous two 'Cartosat 2 Series' namesakes, this was often featured in many ISRO presentations (with a proper name as 'Cartosat-2E') indicating it was likely a civvie, while references to the former two were often avoided. But now this too got the official name as 'Cartosat 2 Series'.

Does that indicate to you that it maybe a dual use satellite by both military and civilian authorities?
It is my understanding that the Cartosat series in general have been considered 'dual-use' by the authorities considering their relatively hi-res imaging capabilities. So yeah, to my mind its really a question of whether it is a normal 'dual-use' Cartosat or a 'military-only' one as its two predecessors (or four considering that both 2A and 2B too have been rumoured to be dedicated for 'strategic users').

Do you think the obfuscation in this case is deliberate or accidental?
Its not likely to be accidental, considering that awkward name 'Cartosat 2 Series' for three satellites in a row. All other ISRO satellites have used atleast a distinct suffix as an identifier in their formal names. The fact that they had called these satellites Cartosat-2C, 2D and 2E in the beginning, but later resorted to these confusingly identical names would suggest that they might like to avoid chances of public identification of these satellites individually in the future. Or maybe there are other reasons that doesn't appear to my mind at the moment.

Offline mtakala24

It can also be debated whether this is the first real Finnish satellite, as the QB-50 satellites are registered to the Netherlands regardless of their country of origin. But Horray! gotta wake up early tomorrow :)

Aalto-1 is not part of QB50.

Yep, but Aalto-2, which was launched from ISS, was.

But lets focus on the mission now.

Offline vineethgk

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ISRO plans PS4 maneuvers after separation of satellites
Quote
“Once the last satellite has been separated from the rocket at a height of 520 km, the fourth stage of the rocket (PS4) comprising two liquid propellant engines will be shut down and reignited three times,” Mr. Jayakumar told The Hindu. While the first two firings are expected to last about six seconds each, the third restart is likely to fire up to 40 seconds.

The multiple reignition of the on board engines will validate the technique and provide ISRO with the mission flexibility to inject satellites into three different orbits in a single flight to reduce the launch cost and save time.

An earlier report had also mentioned that the PS4 would be maneuvered to a lower altitude of 350 km as part of the test.


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Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

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Under two hours to launch.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Online ZachS09

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Propellant filling operations of Second Stage (PS2) are completed. Countdown is progressing normally.

http://isro.gov.in/update/23-jun-2017/propellant-filling-operations-of-second-stage-ps2-are-completed-countdown
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

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