Here's an Earth centred J2000 equatorial state vector for DRO-B:
2025-11-11T00:45:50.816
x= 213253.13473
y=-74960.25633
z=-77939.72821 km
vx=-0.034651
vy=0.84254
vz=1.05605 km/s
🛑

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. ⬇️

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. ⬇️

DRO-B performed a burn a couple days prior to 2025-09-18. I think the asteroid observers just didn't put it together until later. In the coming days I'll confirm with X-band observations.

Sorry typo 2025 US6 not 2015 US6.

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. ⬇️

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...

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...
🛑

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.⬇️

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. ⬇️

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. ⬇️

Now obtain the Starshield dataset which posted with my paper on Zenodo. ⬇️

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