Author Topic: PSLV-XL C57 - Aditya-L1 - SLP - September 2, 2023 - 0620UTC  (Read 23210 times)

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Re: PSLV-XL C57 - Aditya-L1 - FLP - late August 2023
« Reply #20 on: 08/14/2023 07:22 am »
https://twitter.com/chethan_dash/status/1690942187520016384

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#JUSTIN #Sun #Space #India #Thread

India’s first solar mission, #AdityaL1, which Isro hopes to launch by the end of August or early September, has reached the spaceport in Sriharikota. 1/n

Pics: Isro

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“#AdityaL1, the first space-based Indian observatory to study the Sun, is getting ready for launch.  The satellite realised at the URSC has arrived at SDSC-SHAR (spaceport) in Sriharikota,” Isro said. 2/n

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#AdityaL1 will study many properties of Sun, such as dynamics & origins of coronal mass ejections and its home — L1 or first Lagrange point of Earth-Sun system — will allow it to orbit Sun at an almost constant distance from Earth, but without Earth eclipsing its view. 3/n

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Spacecraft will always be in the same direction from Earth as the Sun. So, as Earth rotates, no single ground stn will always be in view of #AdityaL1. Using a global station network like ESA’s is the best way to exchange data & commands with spacecraft as often as possible. 4/n

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Isro Chairman S Somanath told TOI me: “We are expecting to launch Aditya by the end of August.” He had also said that the review committee had recommended additional payload tests to gain confidence.” 5/n

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Days after the #Chandrayaan3 launch, Somanath had told me that the work on getting the launch vehicle, PSLV, was also ongoing and that it was progressing smoothly. 6/n

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Aditya-L1 will be placed 1.5-million-km from Earth in a halo orbit around the L1 point, which provides a greater advantage of observing the solar activities and its effect on space weather in real time. 7/n

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“The spacecraft carries seven payloads to observe the photosphere, chromosphere and the outermost layers of the Sun (the corona) using electromagnetic and particle and magnetic field detectors… 8/n

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…Using L1, four payloads directly view the Sun and the remaining three payloads carry out in-situ studies of particles and fields at L1, providing important scientific studies of the propagatory effect of solar dynamics in the interplanetary medium,” according to Isro. 9/n

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Aditya’s payloads are expected to provide some of the most crucial information to understand the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their characteristics, dynamics of space weather, propagation of particles and fields etc. n/n

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Re: PSLV-XL C57 - Aditya-L1 - FLP - late August 2023
« Reply #21 on: 08/14/2023 05:32 pm »
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PSLV-C57/Aditya-L1 Mission:

Aditya-L1, the first space-based Indian observatory to study the Sun ☀️, is getting ready for the launch.

The satellite realised at the U R Rao Satellite Centre (URSC), Bengaluru has arrived at SDSC-SHAR, Sriharikota.

More pics https://instagram.com/isro.dos/

https://isro.gov.in/Aditya_L1.html

https://twitter.com/isro/status/1690935417342967808

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Re: PSLV-XL C57 - Aditya-L1 - FLP - late August 2023
« Reply #22 on: 08/15/2023 06:48 am »
The NOTAM is saying NET 2 September but the tweet is saying end of August. Is there a new NOTAM with an August timeframe?
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: PSLV-XL C57 - Aditya-L1 - FLP - late August 2023
« Reply #23 on: 08/24/2023 05:38 pm »
https://www.indiatoday.in/science/chandrayaan-3/story/chandrayaan-3-moon-landing-success-update-what-next-for-isro-2426001-2023-08-24 [Aug 24, 2023]

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"Everything is going as per plan. It will take 120 days to reach its destination, nearly 15 lakh kilometres away from Earth," Somnath said. This remarkable journey will place Aditya-L1 in a highly elliptical orbit, allowing it to conduct close observations of the Sun, monitor solar activity, and advance our understanding of the star that sustains life on Earth.

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Re: PSLV-XL C57 - Aditya-L1 - FLP - late August 2023
« Reply #24 on: 08/25/2023 02:22 am »
https://www.wionews.com/india-news/moon-mission-successful-indias-sun-mission-aditya-l1-to-be-launched-in-2-weeks-628856 [Aug 24, 2023]

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"The preparation for Aditya-L1 is going really well. At the Satish Dhawan Space Centre, final checks are being carried out on the spacecraft and the PSLV rocket(mission number C57) for this mission is being assembled," A.Rajarajan, the Director of the spaceport told WION.

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Speaking to WION after the successful landing of Chandrayaan-3, he said that the Aditya-L1 mission is to be launched in the first week of September.

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Re: PSLV-XL C57 - Aditya-L1 - FLP - early September 2023
« Reply #25 on: 08/25/2023 09:05 pm »
https://www.thetechoutlook.com/news/science/isro-to-launch-the-aditya-l1-mission-on-2nd-or-4th-september-2023/ [Aug 25, 2023]

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The Indian Space Research Organisation (ISRO) is looking forward to launching the Aditya-L1 mission in the first week of September 2023. According to the latest update by Indian Aerospace Defence News – IADN, the mission will be launched on the 2nd or 4th of September 2023.


Not sure how accurate this information is.

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Re: PSLV-XL C57 - Aditya-L1 - FLP - early September 2023
« Reply #26 on: 08/27/2023 10:07 pm »
Excerpt from a Malayalam language interview with Asianet News dated 26 Aug 2023:

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Aditya-L1 integrated with launch vehicle. Launch date to be announced in 1-2 days. The spacecraft will take 125 days from launch to reach Lagrangian point L1.

https://twitter.com/pradx/status/1695507123260551290

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« Last Edit: 08/28/2023 10:16 am by input~2 »

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #28 on: 08/29/2023 06:08 am »
With Sun in background ,if antennae on Earth have to decode intelligence, will require a large power to be transmitted from AdityaL1 or a relay outside the solar disc.

How ISRO plans to communicate?

Secondly, If DSN looks directly to Sun, will not the Feed elements/electronics heat abnormally due to solar heat radiation?

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #29 on: 08/29/2023 08:27 am »

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #30 on: 08/29/2023 05:24 pm »
Aditya-L1 mission gallery is up: https://www.isro.gov.in/AdityaL1_gallery.html

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #31 on: 08/29/2023 07:54 pm »
https://twitter.com/isrosight/status/1696546855671259265

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🚀PSLV-C57/🛰️Aditya-L1 Mission:

The launch of Aditya-L1,
the first space-based Indian observatory to study the Sun ☀️, is scheduled for
🗓️September 2,2023, at
🕛11:50 Hrs. IST from Sriharikota.

isro.gov.in/Aditya_L1.html
#AdityaL1 #ISRO

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #32 on: 08/30/2023 05:22 am »
Two booklets on Aditya L1.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #33 on: 08/31/2023 03:23 pm »
https://twitter.com/esaoperations/status/1697263656109801957

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India turns to the Sun 🇮🇳 🛰️☀️

@isro's #Aditya-L1 solar observatory is due to launch on Saturday, 2 September, at 08:20 CEST.

It's the first Indian satellite mission to study the #Sun, and @esa is providing two important types of support: https://esa.int/Enabling_Support/Operations/How_is_ESA_supporting_ISRO_s_Aditya-L1_solar_mission
🧵👇

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#AdityaL1 will study our dynamic and turbulent star using seven scientific instruments.

Four of them will view the Sun directly, while the other three will study the #SpaceWeather the Sun generates in interplanetary space.

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The spacecraft will observe the Sun from the ‘first #Lagrange point’ – L1.

L1 is a gravitational balance point where a spacecraft can operate for years without having to use much fuel.

It’s also a great location to observe the Sun, as Earth never blocks the view of our star.

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ESA is the main provider of #GroundStation support to #AdityaL1.

Our stations will be used to send the commands that control Aditya-L1 in flight, to receive vital data on the spacecraft’s health and location, and to receive the scientific data it sends to Earth.

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Thanks to our global network of antennas, we can communicate with #AdityaL1 at any time.

All three of our large, deep space antennas in Spain, Argentina and Australia will support the mission.

So will Kourou station and @Goonhillyorg, on top of their support to #Chandrayaan3.

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But to carry out its mission, #AdityaL1 first has to get to L1 and stay there safely.

That is not simple.

Come back tomorrow to learn more about how #ESA helped #ISRO prepare for the challenges of operating a spacecraft at a Lagrange point.

Hint: #FlightDynamics

🎨@isro

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #34 on: 09/01/2023 08:09 am »
https://twitter.com/isro/status/1697506899242217921

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PSLV-C57/Aditya-L1 Mission:
The 23-hour 40-minute countdown leading to the launch at 11:50 Hrs. IST on September 2, 2023, has commended today at 12:10 Hrs.

The launch can be watched LIVE
on ISRO Website isro.gov.in
Facebook facebook.com/ISRO
YouTube
DD National TV channel
from 11:20 Hrs. IST

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #35 on: 09/01/2023 02:14 pm »
https://twitter.com/isro/status/1697603558861103467

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Here is the brochure:
https://www.isro.gov.in/media_isro/pdf/AdityaL1_Mission_Brochure.pdf

and a few quick facts:
🔸Aditya-L1 will stay approximately 1.5 million km away from Earth, directed towards the Sun, which is about 1% of the Earth-Sun distance.
🔸The Sun is a giant sphere of gas and Aditya-L1 would study the outer atmosphere of the Sun.
🔸Aditya-L1 will neither land on the Sun nor approach the Sun any closer.

https://www.isro.gov.in/Aditya_L1-MissionDetails.html

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #37 on: 09/02/2023 05:40 am »
https://twitter.com/chethan_dash/status/1697801348363039172

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#Update #Space #thread

While several of its teams continue to romance #Moon, Isro is in the last leg of prep for a "Surya Namaskara". #AdityaL1 slated to launch just hrs from now. Read on to know exclusive details on why launch profile is for 63 mins, about #AOP & more… 1/n

#AdityaL1 will be launched in the 59th flight of #PSLV, after several yrs of devp. PSLV-C57, in XL configuration, will place #AdityaL1 in a highly eccentric Earth-bound orbit, an elliptical orbit whose Perigee is expected to be around 235km & Apogee more than 19,000km. 2/n

From there, #AdityaL1 will perform multiple orbital manoeuvres using LAM (liquid apogee motors) to reach the Lagrange Point-1 or #L1 about 1.5-million-km away. That is 1/100th of the distance between Earth and Sun. 3/n

Unlike a regular #PSLV launch profile, which places spacecraft into orbits roughly under 25 mins from lift-off, #AdityaL1 separation is projected to happen 63-mins after the rocket blasts off from the second launch pad in Sriharikota. 4/n

This'll be one of the longest PSLV missions ever. The Feb 2021 mission that put Brazil’s #Amazonia & 18 sats into orbits took 1.55hrs, while Sept 2016 mission that put 8 sats into orbits took 2.15hrs. Both involved multiple satellites and orbits, unlike #AdityaL1. 5/n

On why such a long time for separation, VSSC director S Unnikrishnan Nair explained: “Spacecraft demands a specific AOP (argument of Perigee). To meet the AOP, we’re not firing PSLV’s final stage (PS4) in a single go… 6/n

…PS4 is fired for 30 seconds when we reach a normal orbit and stay there until we get the required AOP naturally. Then, PS4 is fired again before separation. The separation occurs at 63 minutes because PS4 only separates after the AOP is achieved.” 7/n

Stating that an AOP defines the path of the spacecraft to the final destination, Nair said in Aditya’s case, AOP is “when the ascending trajectory of the spacecraft cuts the (Earth’s) equator”. This angle has been defined and needs to be achieved to make it to L1 as desired. 8/n

“If we wanted a launch profile without this specific AOP, we needed to use the window available next January. To launch now, we need to ensure this AOP to account for the celestial movements,” Nair explained. 9/n

#L1 is a vantage point. Any satellite placed in the halo orbit around L1 has the advantage of continuously viewing the Sun without any occultation/eclipses. This will provide a greater advantage of observing the solar activities and its effect on space weather in real-time. 10/n

What after launch: Post launch, #AdityaL1 stays in Earth-bound orbits for 16 days, during which it undergoes 5 manoeuvres to gain the necessary velocity for its journey… 11/n

…Subsequently, it undergoes a Trans-Lagrangian1 Insertion (TLI) manoeuvre, marking the beginning of its 110-day trajectory to the destination around the L1. Upon arrival at L1, another manoeuvre binds Aditya-L1 to an orbit around L1. 12/n

With #AdityaL1, Isro will venture into the study of solar activities and its effect on space weather. The scientific objectives of Aditya-L1 include the study of coronal heating, solar wind acceleration, CMEs, dynamics of solar atmosphere & temperature anisotropy. 13/n

To achieve this, the spacecraft is packed with seven scientific instruments, which I've reported in detail earlier. n/n

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #38 on: 09/02/2023 05:41 am »
https://twitter.com/haygenwarren/status/1697775081408094288

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Saturday morning, ISRO will launch the Aditya-L1 spacecraft to Sun-Earth Lagrange Point 1 (L1) atop a PSLV-XL rocket. Once at L1, Aditya-L1 will research the Sun and it’s characteristics.

William Graham (@w_d_graham) with the details. ⬇️

https://www.nasaspaceflight.com/2023/09/india-aditya-l1-pslv/

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Re: PSLV-XL C57 - Aditya-L1 - FLP - September 2, 2023 - 0620UTC
« Reply #39 on: 09/02/2023 05:46 am »
Webcast has begun.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Tags: aditya-l1 sun ISRO 
 

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