Author Topic: Satellites leaving 74E  (Read 1478 times)

Offline hvdh

  • Member
  • Posts: 14
  • NL
  • Liked: 12
  • Likes Given: 3
Satellites leaving 74E
« on: 01/10/2017 06:14 PM »
Is or has Gsat-14 been in use at all at 74.0E? No entries can be found in Lyngsat or Flysat.
Because yesterday's TLE had it near 64E, drifting West 0.6/day. It could be the occasional wrong TLE, though.

P.S. I see a warning this is an old topic, should I have post in the general ISRO thread instead?
Or not at all maybe, about possible relocations and other events in the mature satellite life?  ;)

Offline hvdh

  • Member
  • Posts: 14
  • NL
  • Liked: 12
  • Likes Given: 3
Re: Satellites leaving 74E
« Reply #1 on: 01/13/2017 03:21 PM »
The TLE's were corrected, instead of Gsat-14, it's Insat-4CR drifting West.
This should mean Gsat-14 has taken over Insat-4CR services in Ku-band (11.45...11.7 GHz).

Offline hvdh

  • Member
  • Posts: 14
  • NL
  • Liked: 12
  • Likes Given: 3
Re: Satellites leaving 74E
« Reply #2 on: 01/14/2017 04:13 PM »
And now since a few days, we also have Insat-3C leaving 74.0E, drifting East 0.5/day.
Insat-4CR still drifting West 0.7/day, near 61E now.
These slow drift speeds are more typical for relocation than for end-of-life manoevring.

After some further reading, I understand Gsat-18 is intended to replace both 3C and 4CR.
Gsat-18 is at 74.0E since 21 Oct 2016. So very recently, services must have switched to Gsat-18.
Anyone knows more?

Leaves me wondering what the smaller Gsat-14 is doing now, backup capacity?
« Last Edit: 01/14/2017 07:33 PM by input~2 »

Offline c.hazra200

  • Member
  • Posts: 8
  • Liked: 1
  • Likes Given: 0
Re: Satellites leaving 74E
« Reply #3 on: 01/15/2017 01:47 AM »
And now since a few days, we also have Insat-3C leaving 74.0E, drifting East 0.5/day.
Insat-4CR still drifting West 0.7/day, near 61E now.
These slow drift speeds are more typical for relocation than for end-of-life manoevring.

After some further reading, I understand Gsat-18 is intended to replace both 3C and 4CR.
Gsat-18 is at 74.0E since 21 Oct 2016. So very recently, services must have switched to Gsat-18.
Anyone knows more?

Leaves me wondering what the smaller Gsat-14 is doing now, backup capacity?

At east where INSAT-3C is going ? 82E ?
As for INSAT-4CR, after decommissioning of GSAT-3/EDUSAT INSAT-4CR took the role of EDUSAT. CAG in its dth report slammed ISRO for poor planning as it launched GSAT-14(replacement of EDUSAT) too late for which ISRO forced Airtel digital TV to vacant INSAT-4CR as there was no alternative. According to that CAG report GSAT-9 was originally intended to be used as a spare satellite from 48E but after new SAARC satellite plan role of GSAT-9 changed & will be used from any of the prime slots of ISRO.
« Last Edit: 01/15/2017 03:22 AM by c.hazra200 »

Offline hvdh

  • Member
  • Posts: 14
  • NL
  • Liked: 12
  • Likes Given: 3
Re: Satellites leaving 74E
« Reply #4 on: 02/09/2017 10:21 PM »
INSAT-4CR has stopped at about 47.9E, indeed probably to reserve this 48E slot.
INSAT-3C still drifting East, now near 88E.

Offline hvdh

  • Member
  • Posts: 14
  • NL
  • Liked: 12
  • Likes Given: 3
Re: Satellites leaving 74E
« Reply #5 on: 02/27/2017 04:03 PM »
Finally, INSAT-3C (with inclination 0.4) has also arrived according TLE.
At 93.5 East, joining INSAT-4B and GSAT-15.

Offline vyoma

  • Full Member
  • ****
  • Posts: 945
  • India
  • Liked: 215
  • Likes Given: 93
Re: Satellites leaving 74E
« Reply #6 on: 03/29/2017 11:24 PM »
http://www.thehindu.com/news/national/5-new-satellites-this-year-to-raise-isro-capacity/article17740909.ece

Quote
After INSAT-4CR was moved to a new orbital slot a few months ago, its efficiency has been improved and a little extra capacity created for select use, he said.

Tags: