Author Topic: Cartosat-2ER & al. - PSLV C40 - mid December 2017  (Read 783 times)

Offline input~2

  • Moderator
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 5190
  • Liked: 340
  • Likes Given: 154
Quote
ISRO To Launch Third Cartosat Satellite In Mid-December
There will be a few foreign co-passenger satellites...about 15 to 20 (nano satellites)

https://www.ndtv.com/india-news/isro-to-launch-third-cartosat-satellite-in-mid-december-1761601
« Last Edit: 10/11/2017 07:06 PM by input~2 »

Offline vineethgk

  • Full Member
  • ****
  • Posts: 700
  • India
  • Liked: 151
  • Likes Given: 256
Re: Cartosat-2ER & al. - PSLV C40 - mid December 2017
« Reply #1 on: 10/12/2017 03:41 AM »
Its rather intriguing why another Cartosat-2 series satellite was added later to the plan. Considering that the satellite is named 2ER and not 2F I wonder whether one of the earlier satellites met with an as yet undisclosed failure, or that they felt a need for an additional satellite in the fleet.
« Last Edit: 10/12/2017 03:41 AM by vineethgk »

Offline ZachS09

Re: Cartosat-2ER & al. - PSLV C40 - mid December 2017
« Reply #2 on: 10/12/2017 04:26 AM »
Its rather intriguing why another Cartosat-2 series satellite was added later to the plan. Considering that the satellite is named 2ER and not 2F I wonder whether one of the earlier satellites met with an as yet undisclosed failure, or that they felt a need for an additional satellite in the fleet.

I totally agree. Why not move on directly to Cartosat 3? I mean, according to Gunter's Space Page, Cartosat 3 has a 16-kilometer swath in both panchromatic and multispectral modes (respective resolutions are 0.25 meters and 1 meter) while Cartosat 2 has a 10-kilometer swath with a 1-meter spatial resolution.

In addition, Cartosat 2's orbital altitude is 505 kilometers with a 97.5-degree inclination; Cartosat 3's orbital altitude is 450 kilometers with a 98-degree inclination.

http://space.skyrocket.de/doc_sdat/cartosat-2.htm
http://space.skyrocket.de/doc_sdat/cartosat-3.htm
« Last Edit: 10/12/2017 04:28 AM by ZachS09 »
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 12574
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 2750
  • Likes Given: 410
Re: Cartosat-2ER & al. - PSLV C40 - mid December 2017
« Reply #3 on: 10/12/2017 04:46 AM »
Where does it say that this satellite is Cartosat-2ER? The article says

Quote
"We plan to launch Cartosat-2 series satellite 3 mission, which is a follow-on mission in the Cartosat-2 series with the primary objective of providing high-resolution scene specific spot imagery, in mid-December," the official said.

There were three previous Cartosat-2 Series missions (Cartosat 2C, 2D and 2E), so I'm not sure why this one is called Satellite 3.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online russianhalo117

  • Senior Member
  • *****
  • Posts: 3728
  • AR USA / Berlin, DE / Moscow, RF
  • Liked: 687
  • Likes Given: 433
Re: Cartosat-2ER & al. - PSLV C40 - mid December 2017
« Reply #4 on: 10/12/2017 06:27 AM »
Where does it say that this satellite is Cartosat-2ER? The article says

Quote
"We plan to launch Cartosat-2 series satellite 3 mission, which is a follow-on mission in the Cartosat-2 series with the primary objective of providing high-resolution scene specific spot imagery, in mid-December," the official said.

There were three previous Cartosat-2 Series missions (Cartosat 2C, 2D and 2E), so I'm not sure why this one is called Satellite 3.
It was said in the speech of an ISRO official this year. Cartosat-2ER would be flying the manufactured ground spare. Given previous Satellite/instrument failures on other ISRO programmes R typically means replacement. References: INSAT-4CR and INSAT 3DR.
« Last Edit: 10/12/2017 06:31 AM by russianhalo117 »

Offline Stan Black

  • Senior Member
  • *****
  • Posts: 2759
  • Liked: 106
  • Likes Given: 102
Re: Cartosat-2ER & al. - PSLV C40 - mid December 2017
« Reply #5 on: 10/12/2017 07:56 PM »
Where does it say that this satellite is Cartosat-2ER? The article says

Quote
"We plan to launch Cartosat-2 series satellite 3 mission, which is a follow-on mission in the Cartosat-2 series with the primary objective of providing high-resolution scene specific spot imagery, in mid-December," the official said.

There were three previous Cartosat-2 Series missions (Cartosat 2C, 2D and 2E), so I'm not sure why this one is called Satellite 3.

There is mention in the annual report and other budget documents that satellite 3 is an improved model? The last three have just been called Cartosat-2 series on the website; no number or letter? So when they say satellite 3, is it not number 3 but another of the same configuration?
« Last Edit: 10/12/2017 08:59 PM by Stan Black »

Offline input~2

  • Moderator
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 5190
  • Liked: 340
  • Likes Given: 154
Re: Cartosat-2ER & al. - PSLV C40 - mid December 2017
« Reply #6 on: 10/13/2017 11:56 AM »
Where does it say that this satellite is Cartosat-2ER?
Steven, please have a look here:
http://forum.nasaspaceflight.com/index.php?topic=1173.msg1718545#msg1718545

Tags: