Author Topic: PSLV-DL C58 - XPoSat, POEM-3 Etal - FLP - January 1, 2024 (03:40 UTC)  (Read 19363 times)

Offline vyoma

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XPoSat is a space observatory satellite being developed by ISRO and the Raman Research Institute. It'll be launched by SSLV, probably in Q4 2022.

Payloads on XPoSat:
1) POLIX (Polarimeter Instrument in X-rays) developed by the Raman Research Institute.
2) XSPECT (X-ray Spectroscopy and Timing) developed by URSC, ISRO.
« Last Edit: 01/01/2024 03:01 am by russianhalo117 »

Offline vyoma

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POLIX payload information.
« Last Edit: 07/10/2022 11:07 pm by vyoma »

Offline vyoma

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XPoSat mission objectives.
« Last Edit: 07/10/2022 11:10 pm by vyoma »

Online Steven Pietrobon

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I don't remember where I got the information from, but my information is that XPoSat is flying on SSLV D3 in December 2022.
« Last Edit: 07/11/2022 08:15 am by Steven Pietrobon »
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Offline vyoma

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I don't remember where I got the information from, but my information is that XPoSat is flying on SSLV D3 in December 2022.

Thanks, updated thread title.

Offline vyoma

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Quote
POLIX is an X-ray Polarimeter Instrument for Astronomical Observations under development at the Raman Research Institute. It is the only instrument in the energy band of medium energy X-rays, 8-30 keV, and is the main payload on the soon to be launched dedicated ISRO satellite XPoSat. A completely in-house design, and development, of the Qualification Model (QM) of POLIX was completed in the current year and has successfully undergone space qualification tests like vibration test and environmental test at the UR Rao Satellite Centre (URSC).

From Government of India, Department of Science and Technology Annual Report 2021-22: https://dst.gov.in/sites/default/files/Annual%20Report%202021-22%20%28English%29.pdf
« Last Edit: 07/11/2022 04:56 pm by vyoma »

Offline vyoma

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From "Space Research in India" 2020-2021 report here:

Quote
XSPECT: X-ray spectroscopy and Timing on XPoSAT
XPoSat is India’s X-ray polarimeter mission carrying POLIX (A Thomson scattering polarimeter) and XSPECT (X-ray Spectroscopy and Timing) payloads. XSPECT is large area spectrometer payload and has a unique opportunity to observe astrophysical sources for very long durations to study their spectral and temporal variability in 0.8 to 15 keV x-ray band.

XSPECT is configured as two detector packages connected to a single electronics packages, which powers the detectors and does the necessary signal conditioning and has interface with spacecraft. Two different Field of Views (FOV) collimators, 2°X2° and 3°X3 are used enabling us to efficiently model-out the X-ray sky background. Swept Charge Device (SCD)s are used as detectors (effective area of ~35cm2 @ 6keV). These detectors enable XSPECT to have pile-up free observations at the expected count-rates with a very good energy resolution of less than ~ 200 eV @ 5.9keV. XSPECT provides a timing resolution of ~2 msec.

Quote
Polarimeter Instrument in X-rays (POlIX): The POLIX payload on-board XPOSAT aims at measuring the degree and direction of polarisation of X-ray photons from about 50 potential cosmic sources of interest in the energy band 8-30 keV. The instrument is being developed by Raman Research Institute, Bengaluru with the support of URSC.

Offline vyoma

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From "Space Research in India" 2020-2021 report here:

Quote
X-ray Polarimeter (POlIX)

During the past few years, RRI has been designing and building an X- ray polarimeter (POLIX) instrument for astronomical observations. POLIX is the main payload onboard the small satellite mission of ISRO called XPoSat dedicated for X-ray polarization measurement from cosmic sources. X-ray polarimetry is an unexplored area in high energy astrophysics. X-ray polarization measurements can give valuable insights into (i) the strength and the distribution of magnetic field in the sources (ii) geometric anisotropies in the sources (iii) their alignment with respect to the line of sight and (iv) the nature of the accelerator responsible for energizing the electrons taking part in radiation and scattering. Development of the Qualification Model (QM) of the X-ray Polarimeter instrument POLIX has been completed and assembly and tests of the Flight Model (FM) is ongoing.

Offline vyoma

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Looks like launch planned in Q2 2023. From Lok Sabha (parliment) Q&A sessions: http://164.100.24.220/loksabhaquestions/annex/179/AU556.pdf [20 July 2022]

Budget sanctioned for the mission is ₹60 crore (~$7.5M at today's exchange rates).
« Last Edit: 07/20/2022 06:37 pm by vyoma »

Offline zubenelgenubi

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No mention of upcoming SSLV launches in recent months.  Apparently, we know ISRO's full orbital launch schedule through July 2023.  Thus launch must be NET July or August Q3.

For now, I have re-edited the the thread title from "NET Q3 2023" to date "TBD."

Edited
« Last Edit: 05/31/2023 10:55 am by zubenelgenubi »
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Offline vyoma

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SSLV D3 would also carry this payload: Space borne GNSS-Reflectometry with NavIC

Offline vyoma

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XPoSat User Meet stream (25 May 2023):


Offline zubenelgenubi

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https://www.reddit.com/r/ISRO/comments/125rfb4/parliamentary_qa_29_march_2023_queries_on/
Regarding payloads to be launched by ISRO in 2023:
XPoSat is one of the listed payloads, aboard SSLV D3.

Lok Sahba questions and answers, March 29, 2023, pdf file attached

NET September:
Seeking correction or confirmation:

Chandrayaan-3 : LVM3 M4 : SLP : 12 July

commercial launch : PSLV : FLP : July

1st Gaganyaan in-flight abort test : S200 stage : FLP : early? August

Aditya-L1 : PSLV-XL C56 : FLP : mid August

INSAT-3DS : GSLV MkII F14? : SLP : after Chandrayaan-3
« Last Edit: 06/17/2023 04:17 am by zubenelgenubi »
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https://www.reddit.com/r/ISRO/comments/125rfb4/parliamentary_qa_29_march_2023_queries_on/
Regarding payloads to be launched by ISRO in 2023:
XPoSat is one of the listed payloads, aboard SSLV D3.

Lok Sahba questions and answers, March 29, 2023, pdf file attached

NET September:
Seeking correction or confirmation:

Chandrayaan-3 : LVM3 M4 : SLP : 12 July

commercial launch : PSLV : FLP : July

1st Gaganyaan in-flight abort test : S200 stage : FLP : early? August

Aditya-L1 : PSLV-XL C56 : FLP : mid August

INSAT-3DS : GSLV MkII F14? : SLP : after Chandrayaan-3

On the other hand the XPoSat User Meet stream above has the LV as PSLV (1:08:35 mark). I'm not sure if there was a late change.
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Offline zubenelgenubi

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On the other hand the XPoSat User Meet stream above has the LV as PSLV (1:08:35 mark). I'm not sure if there was a late change.
I edited the thread title.

Given the mass and orbit, I think a PSLV-CA will be sufficient, assuming this is the sole payload.

This could also be the "missing" C59 launch.

Screencap of PowerPoint at timepoint mentioned is attached.
« Last Edit: 06/17/2023 07:50 am by zubenelgenubi »
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Offline vyoma

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https://timesofindia.indiatimes.com/home/science/discussions-are-on-for-further-moon-landing-missions-says-isro-chairman/articleshow/101982513.cms?from=mdr [Jul 20, 2023]

Quote
BENGALURU: The Indian Space Research Organisation (Isro) is almost ready with XPoSat (X-ray Polarimeter Satellite), the country's first dedicated polarimetry mission to study various dynamics of bright astronomical X-ray sources in extreme conditions, chairman Somanath S said on Thursday.

Offline vyoma

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https://timesofindia.indiatimes.com/india/beyond-sun-moon-isro-chief-somanath-reiterates-missions-in-pipeline/articleshow/102741661.cms?from=mdr [Aug 15, 2023]

Quote
He said another interesting science mission, Xposat — India's first dedicated polarimetry mission to study various dynamics of bright astronomical X-ray — was ready.

No dates yet.

Offline TheVarun

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This setellite( XPOSat) may be launched by the SSLV D3. I don't think ISRO has explicitly stated that it is a PSLV launch. Possible,  of course.

Online GewoonLukas_

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This setellite( XPOSat) may be launched by the SSLV D3. I don't think ISRO has explicitly stated that it is a PSLV launch. Possible,  of course.

Confirmed for PSLV:

An excerpt from Malayalam language interview with ISRO chairman on Asianet News dated 26 Aug 2023:

Quote
INSAT-3DS on the GSLV, XPoSAT on the PSLV, SSLV-D3 launch, commercial launch of PSLV, unmanned Gaganyaan launch on LVM3,are upcoming missions over the next few months. Will give you enough news items in the next few months.
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Offline Vahe231991

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Any latest update on the launch window for the XPoSat? If the Anvesha launches this month, then the XPoSat could launch in the fourth quarter of this year.

 

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