Scott Tilley
@coastal8049.bsky.social
if (Coherence == Integrity)
transmit();
else
receive();
transmit();
else
receive();
There could be another lunar encounter in April of 2026 and after that things get really unstable. We're now in a very chaotic realm where CHANDRAYAAN 3 service module could end up in solar orbit or impacting the Moon or even Earth.
See alt text for state vector.🛑
See alt text for state vector.🛑
November 14, 2025 at 3:07 AM
There could be another lunar encounter in April of 2026 and after that things get really unstable. We're now in a very chaotic realm where CHANDRAYAAN 3 service module could end up in solar orbit or impacting the Moon or even Earth.
See alt text for state vector.🛑
See alt text for state vector.🛑
The best I can tell there was no burn and this seems corroborated by @ISRO's statement below. The orbit wandered close enough to the Moon in early November 2025 that the Moon’s gravity took over. This wasn’t an intentional manoeuvre, it was natural 3-body drift.⬇️
November 14, 2025 at 3:07 AM
The best I can tell there was no burn and this seems corroborated by @ISRO's statement below. The orbit wandered close enough to the Moon in early November 2025 that the Moon’s gravity took over. This wasn’t an intentional manoeuvre, it was natural 3-body drift.⬇️
HANDRAYAAN-3 was last reported by Space-Track.org on 2025-06-27. In September it became obvious from asteroid tracking data that the service module would encounter the Moon in early November twice. 🧵⬇️
November 14, 2025 at 3:07 AM
HANDRAYAAN-3 was last reported by Space-Track.org on 2025-06-27. In September it became obvious from asteroid tracking data that the service module would encounter the Moon in early November twice. 🧵⬇️
CHANDRAYAAN-3 service module has been recovered.
She's located about 7 degrees south east of the Moon this morning.
She's located about 7 degrees south east of the Moon this morning.
November 13, 2025 at 6:55 PM
CHANDRAYAAN-3 service module has been recovered.
She's located about 7 degrees south east of the Moon this morning.
She's located about 7 degrees south east of the Moon this morning.
Thanks to the some hawk eyed followers, CHANDRAYAAN 3 service module appears to be engaged in cis-lunar navigation activities and is in a new orbit.
isro.gov.in/Chandrayaan_...
isro.gov.in/Chandrayaan_...
November 13, 2025 at 6:53 PM
Thanks to the some hawk eyed followers, CHANDRAYAAN 3 service module appears to be engaged in cis-lunar navigation activities and is in a new orbit.
isro.gov.in/Chandrayaan_...
isro.gov.in/Chandrayaan_...
DRO-B has been confirmed to be in a new orbit based on reception of X-band signals.
The spacecraft remains at low declination but will rapidly rise northward over the next couple of days allowing more data to be obtained. 🧵⬇️
The spacecraft remains at low declination but will rapidly rise northward over the next couple of days allowing more data to be obtained. 🧵⬇️
November 11, 2025 at 1:55 AM
DRO-B has been confirmed to be in a new orbit based on reception of X-band signals.
The spacecraft remains at low declination but will rapidly rise northward over the next couple of days allowing more data to be obtained. 🧵⬇️
The spacecraft remains at low declination but will rapidly rise northward over the next couple of days allowing more data to be obtained. 🧵⬇️
Spooky Moon and natural cobwebs over the dish antennas...
Happy Halloween all! 🎃
Happy Halloween all! 🎃
November 1, 2025 at 4:21 AM
Spooky Moon and natural cobwebs over the dish antennas...
Happy Halloween all! 🎃
Happy Halloween all! 🎃
DRO-A still hanging around the Moon and actually angularly close to it tonight.
Data sidebands clearly visible and tantalizing close to being decodable.
Data sidebands clearly visible and tantalizing close to being decodable.
November 1, 2025 at 4:18 AM
DRO-A still hanging around the Moon and actually angularly close to it tonight.
Data sidebands clearly visible and tantalizing close to being decodable.
Data sidebands clearly visible and tantalizing close to being decodable.
TIANWEN-2 is presently about 36 million km from Earth and out aheard of us and will rendezvous with asteroid 469219 Kamoʻoalewa in July of 2026. 🛑
October 30, 2025 at 7:51 PM
TIANWEN-2 is presently about 36 million km from Earth and out aheard of us and will rendezvous with asteroid 469219 Kamoʻoalewa in July of 2026. 🛑
TIANWEN-2 doesn't emit much on X-band. It's theorized that it is using solar electric propulsion (SEP) to some extent and not aiming at Earth all the time. I periodically check in on it and plot it's heard position since recovery in late August 2025. ⬇️
October 30, 2025 at 7:51 PM
TIANWEN-2 doesn't emit much on X-band. It's theorized that it is using solar electric propulsion (SEP) to some extent and not aiming at Earth all the time. I periodically check in on it and plot it's heard position since recovery in late August 2025. ⬇️
Earlier releases by CNSA indicated that the burn would happen on 2025-10-30. So it could have already occurred earlier today or will be conducted as TW-2 comes into view of China later today. ⬇️
October 30, 2025 at 7:51 PM
Earlier releases by CNSA indicated that the burn would happen on 2025-10-30. So it could have already occurred earlier today or will be conducted as TW-2 comes into view of China later today. ⬇️
As expected TIANWEN-2 appeared on X-band today, likely ahead or possibly just after it's first major deep space burn.
🧵⬇️
🧵⬇️
October 30, 2025 at 7:51 PM
As expected TIANWEN-2 appeared on X-band today, likely ahead or possibly just after it's first major deep space burn.
🧵⬇️
🧵⬇️
DRO-B is spending most of it's time at southern declinations and will only briefly poke its nose up north during perigee. But it will be well placed for observation when it does over head of me. 🛑
October 30, 2025 at 3:36 AM
DRO-B is spending most of it's time at southern declinations and will only briefly poke its nose up north during perigee. But it will be well placed for observation when it does over head of me. 🛑
DRO-B is in a ~5:3 lunar-resonant HEO with the following parameters:
a=271,253 km,
i=28.1 deg,
e=0.4435,
Rp=150,940 km,
Ra=391,566 km,
T=16.27 days.
The orbit is stable based on propagation with GMAT through 2030. ⬇️
a=271,253 km,
i=28.1 deg,
e=0.4435,
Rp=150,940 km,
Ra=391,566 km,
T=16.27 days.
The orbit is stable based on propagation with GMAT through 2030. ⬇️
October 30, 2025 at 3:36 AM
DRO-B is in a ~5:3 lunar-resonant HEO with the following parameters:
a=271,253 km,
i=28.1 deg,
e=0.4435,
Rp=150,940 km,
Ra=391,566 km,
T=16.27 days.
The orbit is stable based on propagation with GMAT through 2030. ⬇️
a=271,253 km,
i=28.1 deg,
e=0.4435,
Rp=150,940 km,
Ra=391,566 km,
T=16.27 days.
The orbit is stable based on propagation with GMAT through 2030. ⬇️
🚨 DRO-B in new Orbit.
The Minor Planet Electronic Circular 2025-U223 identified a new object 2015 US6, & this was later determined to DRO-B and deleted from the registry in (M.P.E.C) 2025-U218.
Using those, an estimate of the trajectory was made and what I found surprised me!
🧵⬇️
The Minor Planet Electronic Circular 2025-U223 identified a new object 2015 US6, & this was later determined to DRO-B and deleted from the registry in (M.P.E.C) 2025-U218.
Using those, an estimate of the trajectory was made and what I found surprised me!
🧵⬇️
October 30, 2025 at 3:36 AM
🚨 DRO-B in new Orbit.
The Minor Planet Electronic Circular 2025-U223 identified a new object 2015 US6, & this was later determined to DRO-B and deleted from the registry in (M.P.E.C) 2025-U218.
Using those, an estimate of the trajectory was made and what I found surprised me!
🧵⬇️
The Minor Planet Electronic Circular 2025-U223 identified a new object 2015 US6, & this was later determined to DRO-B and deleted from the registry in (M.P.E.C) 2025-U218.
Using those, an estimate of the trajectory was made and what I found surprised me!
🧵⬇️
This is a Walker-Delta constellation which still has missing planes but complete global coverage.
The plot below provides an analysis of the heard vs. unheard objects and the respective positions of the active orbital planes.
🛑
en.wikipedia.org/wiki/Satelli...
The plot below provides an analysis of the heard vs. unheard objects and the respective positions of the active orbital planes.
🛑
en.wikipedia.org/wiki/Satelli...
October 20, 2025 at 5:38 AM
This is a Walker-Delta constellation which still has missing planes but complete global coverage.
The plot below provides an analysis of the heard vs. unheard objects and the respective positions of the active orbital planes.
🛑
en.wikipedia.org/wiki/Satelli...
The plot below provides an analysis of the heard vs. unheard objects and the respective positions of the active orbital planes.
🛑
en.wikipedia.org/wiki/Satelli...
Wondering how the Starshield constellation is presently structured?
This animation using non-government data and the known active satellites on S-band show you how it's presently structured.
It has global coverage with 180° 'dense' regions. 🧵⬇️
This animation using non-government data and the known active satellites on S-band show you how it's presently structured.
It has global coverage with 180° 'dense' regions. 🧵⬇️
October 20, 2025 at 5:38 AM
Wondering how the Starshield constellation is presently structured?
This animation using non-government data and the known active satellites on S-band show you how it's presently structured.
It has global coverage with 180° 'dense' regions. 🧵⬇️
This animation using non-government data and the known active satellites on S-band show you how it's presently structured.
It has global coverage with 180° 'dense' regions. 🧵⬇️
Here's some suggested reading on using STRF for new users:
destevez.net/2019/01/an-s...
skyriddles.wordpress.com/2023/07/27/u...
skyriddles.wordpress.com/2019/01/04/b...
🛑
destevez.net/2019/01/an-s...
skyriddles.wordpress.com/2023/07/27/u...
skyriddles.wordpress.com/2019/01/04/b...
🛑
October 19, 2025 at 11:45 PM
Here's some suggested reading on using STRF for new users:
destevez.net/2019/01/an-s...
skyriddles.wordpress.com/2023/07/27/u...
skyriddles.wordpress.com/2019/01/04/b...
🛑
destevez.net/2019/01/an-s...
skyriddles.wordpress.com/2023/07/27/u...
skyriddles.wordpress.com/2019/01/04/b...
🛑
Now you can explore the dataset. Use the 'h' command to find out about the other features of STRF. Rfplot will output various data files as .dat files that can by analyzed in rffit should you want to explore more.
The dataset involves almost 14 days of continuous data.⬇️
The dataset involves almost 14 days of continuous data.⬇️
October 19, 2025 at 11:45 PM
Now you can explore the dataset. Use the 'h' command to find out about the other features of STRF. Rfplot will output various data files as .dat files that can by analyzed in rffit should you want to explore more.
The dataset involves almost 14 days of continuous data.⬇️
The dataset involves almost 14 days of continuous data.⬇️
Once you have setup everything you can now view the data using the 'rfplot' utility. In the images below I've provided you with the command sequence and what you should expect to see on the screen once deployed. Once loaded you can zoom in with mouse and press 'c'.⬇️
October 19, 2025 at 11:45 PM
Once you have setup everything you can now view the data using the 'rfplot' utility. In the images below I've provided you with the command sequence and what you should expect to see on the screen once deployed. Once loaded you can zoom in with mouse and press 'c'.⬇️
Next you need to do a bit of editing. The Constellation_summary.csv file provides you with a list of all the objects in the amateur optical database. You need to create a new file called 'frequencies.txt' as noted below and place that in the data directory you defined above. ⬇️
October 19, 2025 at 11:45 PM
Next you need to do a bit of editing. The Constellation_summary.csv file provides you with a list of all the objects in the amateur optical database. You need to create a new file called 'frequencies.txt' as noted below and place that in the data directory you defined above. ⬇️
As you will have noted when you setup STRF there are a couple of paths you need to setup for data and TLEs in the Linux OS. Place the TLE file in the TLE directory you identify. And the sites.txt in the data directory. ⬇️
October 19, 2025 at 11:45 PM
As you will have noted when you setup STRF there are a couple of paths you need to setup for data and TLEs in the Linux OS. Place the TLE file in the TLE directory you identify. And the sites.txt in the data directory. ⬇️
Within the dataset archive you will find 3 text files:
classfd_edit_ss.tle
Constellation_summary.csv
sites.txt
These are the TLEs, frequencies and details of my observing site needed by STRF to function.
Yes, I'm doxxing myself in the interest of transparency. ⬇️
classfd_edit_ss.tle
Constellation_summary.csv
sites.txt
These are the TLEs, frequencies and details of my observing site needed by STRF to function.
Yes, I'm doxxing myself in the interest of transparency. ⬇️
October 19, 2025 at 11:45 PM
Within the dataset archive you will find 3 text files:
classfd_edit_ss.tle
Constellation_summary.csv
sites.txt
These are the TLEs, frequencies and details of my observing site needed by STRF to function.
Yes, I'm doxxing myself in the interest of transparency. ⬇️
classfd_edit_ss.tle
Constellation_summary.csv
sites.txt
These are the TLEs, frequencies and details of my observing site needed by STRF to function.
Yes, I'm doxxing myself in the interest of transparency. ⬇️
Now obtain the Starshield dataset which posted with my paper on Zenodo. ⬇️
zenodo.org/records/1737...
zenodo.org/records/1737...
October 19, 2025 at 11:45 PM
Now obtain the Starshield dataset which posted with my paper on Zenodo. ⬇️
zenodo.org/records/1737...
zenodo.org/records/1737...
First you need STRF and a Linux computer to run it on. Carefully read the setup info provided in the archive. ⬇️
github.com/cbassa/strf
github.com/cbassa/strf
October 19, 2025 at 11:45 PM
First you need STRF and a Linux computer to run it on. Carefully read the setup info provided in the archive. ⬇️
github.com/cbassa/strf
github.com/cbassa/strf