iiinova — where your digital self keeps evolving

Scott Tilley @coastal8049.bsky.social · 30/09/2026

It was a beautiful day to share with the community.

Scott Tilley @coastal8049.bsky.social · 28/09/2026

JUICE is completing an Earth flyby tonight. I have been monitoring it come in for over a week and last night it's signal was very loud and fading up and down, likely on MGA. Tonight weaker but very stable, perhaps LGA. LHCP for those what wish to look.

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Scott Tilley @coastal8049.bsky.social · 06/09/2026

RST sported a new mode on S-band last night and having a go at recording to do some analysis later tonight. Its cyclostationary components are very strong and of great interest to my research. At over 750000km RST is about half way to the Earth-Sun L2 point.

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Scott Tilley @coastal8049.bsky.social · 04/09/2026

Roman Space Telescope (RST) peaking through the trees. The audio is of the command echoes coming back down via the transponder. The TT&C data is about 800KHz wide!

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Scott Tilley @coastal8049.bsky.social · 03/09/2026

One of the more interesting pieces of hardware on the new Nancy Grace Roman Space Telescope (RST) is its communications antenna. Roman and JWST both use S-band for command/telemetry/ranging and Ka-band for science data, but their antenna systems are quite different. 🧵⬇️

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Scott Tilley @coastal8049.bsky.social · 03/09/2026

Roman Space Telescope (RST) S-band emission. Command echoes on the transponder are fairly loud. The signal appears to be LHCP.

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Scott Tilley @coastal8049.bsky.social · 02/09/2026

AMSAT-CA has a vision: make Amateur Radio satellites more accessible, develop open source ground stations and balloon projects, and ultimately take Canadian Amateur Radio to the Moon. As Vice President, I invite you to join us and help build it. amsat-ca.org/membership/

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Scott Tilley @coastal8049.bsky.social · 16/08/2026

De-orbit burn from Globalstar 2-R Mission 1 observed from Port Stanley, Ontario entirely by accident. 2026-08-15T02:59:23 UTC, with an iPhone.

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Scott Tilley @coastal8049.bsky.social · 12/08/2026

Dozing on a red eye flight and woke to the Cresent Moon and Mercury rising.

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Scott Tilley @coastal8049.bsky.social · 09/08/2026

A few years ago I noticed an ~800-baud BPSK signal from WGS-6 and filed it away as “interesting.” Today I finally chased it down. Something very familiar is hiding in that signal, and the trail leads straight back to DSCS-III.🧵⬇️

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Scott Tilley @coastal8049.bsky.social · 06/08/2026

Even with the thick forest fire haze some interesting near Earth asteroids are easily tracked. Lots of angular motion of a hour or two of tracking. 2000 VY137 (mag 14.7) from 2026-08-05 and 2004 OT11 (mag 13.8) from 2025-08-06.

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Scott Tilley @coastal8049.bsky.social · 04/08/2026

NROL-95's payload appears to be NOSS related. Monitoring 2277.5MHz for reasons other than this, I noted a strong NOSS like emission pass through the beam. Earlier hits confirm. New NOSS use a different channel than the operational NOSS, either 2222.5, 2232.5 & 2277.5Mhz.

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Scott Tilley @coastal8049.bsky.social · 03/08/2026

Some more fun with USA 134 (DSCS III B-13) beacon applying Viterbi corrections. The spacecraft dips behind a cedar tree for testing purposes. 😎 @ea4gpz came up with a convolutional encoder.🧵⬇️ destevez.net/2020/06/reve...

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Scott Tilley @coastal8049.bsky.social · 03/08/2026

What exactly is still coming out of a 30-year-old military communications satellite? A 1992 AFIT thesis documents the DSCS III-B beacon telemetry. Bits 49–100 the general configuration of the spacecraft's communications payload including a classified telemetry option...🧵⬇️

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Scott Tilley @coastal8049.bsky.social · 02/08/2026

A mount-control torture test turned into a spacecraft telemetry investigation. Tracking two DSCS III satellites at X-band, I found USA 134 still sending clean telemetry, while USA 167 appears to transmit the beacon framework without encoded telemetry reaching channel 7. 🧵⬇️

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Scott Tilley @coastal8049.bsky.social · 31/07/2026

Ryan Lebois of @SEE_Aerospace presents our ghost tracking results of Blue Ghost at the 2026 Astrodynamics Specialist Conference in Whistler, BC. Thanks to @amsat-dl.org for their contribution.

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Scott Tilley @coastal8049.bsky.social · 20/07/2026

MERIDIAN 11 [68571, 2026-071A] has replaced in the same constellation slot as MERIDIAN 7 which is now inoperative. Decoded the TTY beacon sequence and it shares a similar linage to MERIDIAN 10.

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Scott Tilley @coastal8049.bsky.social · 17/07/2026

I updated a local fork of Cees Bassa's STRF today to work with Alpha-5 as space-track.org is now actively using this for catalogue IDs. github.com/ScottTilley/...

github.com

GitHub - ScottTilley/strf: Radio Frequency Satellite Tracking

Radio Frequency Satellite Tracking. Contribute to ScottTilley/strf development by creating an account on GitHub.

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Scott Tilley @coastal8049.bsky.social · 15/07/2026

I'll be attending 2026 AAS/AIAA Astrodynamics Specialist Conference at Whistler, BC. Presenting a paper on the tracking of Blue Ghost where @amsat-dl.org, SEE_Aerospace and I 'ghost' tracked it to inform the utility of 3-way Doppler augmentation. Hoping to see many friends there.

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Scott Tilley @coastal8049.bsky.social · 10/06/2026

I spoke with Gadi Schwartz of NBC News NOW about the oldest known zombie satellite TRANSIT 5B-5 and, hopefully, helped clear up the record on this story and a few related topics. You can watch the interview at 5pm Pacific / 8pm Eastern on NBC News NOW on, YouTube, or NBC . com. Credit: APL

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Scott Tilley @coastal8049.bsky.social · 08/06/2026

Ironically, the oldest NAVSTAR satellite in operation is the last to be detected in my audit of GPS L1. NAVSTAR 48 (USA 151), [26407, 2000-040A]. It turns 26 on July 16th. Sense where I'm going with this?

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Scott Tilley @coastal8049.bsky.social · 06/06/2026

Something is interfering with GPS, but “we found you” is not earned yet. EKS is plausible, but active classified NRO HEO/SDS objects occupy similar geometry and appear omitted. The NRO is not above spectrum abuse. Without direct RF custody, this remains theory, not attribution.

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Scott Tilley @coastal8049.bsky.social · 11/04/2026

I'm glad to see the astronauts safely home! I hope the world finds the focus and real reasons to continue manned space exploration for the benefit of all mankind. Onto the next tracking mission...

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Scott Tilley @coastal8049.bsky.social · 10/04/2026

Oh my! The latest of the Chinese LEO weather satellites are capable of detecting ships at sea. One of the BC Ferries is in the middle of the Salish Sea and underway. See her specs below for reference. AIS plot from a few 10s of minutes after the pass also provided.

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Scott Tilley @coastal8049.bsky.social · 09/04/2026

Almost sunset and FENGYUN-3G (the low flying weather sat) shows us the Cascade volcano shadows nicely. I miss NOAA 15 for these types of images as its aesthetic was the best.

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Scott Tilley @coastal8049.bsky.social · 07/04/2026

The most profound thing I've heard from Artemis II thus far. "You're go to go" (audio on)

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Reposted by Scott Tilley

Ben Dooley @bentdooley.bsky.social · 07/04/2026

History made! 🚀 🇨🇦 Jeremy Hansen and the #ArtemisII crew have officially broken the distance record set by Apollo 13. They’re further from Earth than any human has ever been. Even cooler? Sunshine Coast’s own @coastal8049.bsky.social is helping NASA track the mission from his home-built system. 📡

podcasts.apple.com

Humans have travelled farther from Earth than ever before

Podcast Episode · The Jill Bennett Show · April 6 · Bonus · 10m

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Scott Tilley @coastal8049.bsky.social · 06/04/2026

Artemis II entered the Lunar Hill sphere.

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Scott Tilley @coastal8049.bsky.social · 04/04/2026

#Artemis2 is a challenging object to collect Doppler from with a small sensor. Since Artemis I, I began research into a method of Doppler extraction that doesn't rely on a carrier, demodulation or FFT. I can report success! Nearly complete pass with heavy tree attenuation.🧵⬇️

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Scott Tilley @coastal8049.bsky.social · 04/04/2026

This screenshot appears to reveal success in my new way of reducing Doppler without using a FFT from signals like Artemis II is using. My software is firmly locked on Artemis II and reducing Doppler all without demodulation or FFTs... All in a ultra-low SNR environment.

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Scott Tilley @coastal8049.bsky.social · 04/04/2026

Today I lost a friend. Goodbye Jason Whyte, AKA VJ Honeybee.

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Scott Tilley @coastal8049.bsky.social · 03/04/2026

First day Doppler analysis of Artemis II.

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Scott Tilley @coastal8049.bsky.social · 02/04/2026

Artemis II is flying a very southern declination trajectory for most of the mission. Despite the extremely low elevation angles I received very useful data this morning. This was exactly the type of data I was hoping for to test new small dish cis-lunar tracking techniques.

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Scott Tilley @coastal8049.bsky.social · 02/04/2026

So what’s going on here with respect to Artemis II? The mission is flying a northern hemisphere adverse trajectory. But as you can see from these early models it’s very dynamic. DSN activity schedule vs trajectory.

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Scott Tilley @coastal8049.bsky.social · 01/04/2026

I’ve been helping the University of New Brunswick (UNB) team get ready for Artemis II. Brent Petersen and I both sit on the AMSAT-CA board and have a common vision to build a pan Canadian space monitoring culture. GO ARTEMIS II, GO UNB! globalnews.ca/news/1175516...

globalnews.ca

New Brunswick students collecting data for NASA as part of Artemis II mission - New Brunswick | Globalnews.ca

The world has been collectively anticipating the launch of Artemis II but five university students in New Brunswick are keeping an especially close eye on the mission to the moon.

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Scott Tilley @coastal8049.bsky.social · 23/03/2026

DRO-A/B observed orbital motion recording begins.

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Scott Tilley @coastal8049.bsky.social · 23/03/2026

DRO-A/B remain co-located in a DRO. This after DRO-B apparently return to join its colleague after a wander 'there and back.'

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Scott Tilley @coastal8049.bsky.social · 13/03/2026

Revised IMAP at Earth-Sun L1 point. Measured it's rotation rate by comparing my Doppler to JPL Horizons data and tested out a new feature I created for STRF that eliminates aliased measurements. IMAP is spinning at pretty much exactly the 15s period is should be. 🧵⬇️

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Scott Tilley @coastal8049.bsky.social · 03/03/2026

Chang'e 6 remains active in its very distant HEO of the Earth. In fact it is passing by the Moon just outside the eclipsed area tonight. Imagine below at peak lunar eclipse at 11:34UTC.

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Scott Tilley @coastal8049.bsky.social · 26/02/2026

There and Back Again INDEED! We seem to have caught DRO-B returning its twin DRO-A in DRO of the Moon after documenting a journey to the Lonely Mountain and back. Nice catch my Graham G8FXB!

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Scott Tilley @coastal8049.bsky.social · 24/02/2026

DRO-B appears to have returned to DRO orbit of the Moon after it's wander to a 3:2 resonance touring EM L3-L5 orbit in Spring 2025. Then is took to a high Earth orbit in Fall 2025 and back this winter. Graham G8FXB picked it back up on a routine monitoring of KPLO the other day.

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Scott Tilley @coastal8049.bsky.social · 24/02/2026

Tuning up for @NASAArtemis using JWST’s S-band emission. Its schedule is public. Its motion is in the Doppler. Overlay the two and they match. Spacecraft geometry, revealed in RF. 📡🛰️✨

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Scott Tilley @coastal8049.bsky.social · 20/02/2026

In January @russianforces.org pointed out odd behaviour from the Russian ELS/TUNDRA satellite early warning system. The co-ordinated westward drift in apogee longitude appears to have ended in a co-ordinated manner. 🧵⬇️ bsky.app/profile/coas...

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Scott Tilley @coastal8049.bsky.social · 04/02/2026

I finally observed IBEX the other day on S-Band. It appears to dump for an hour then turn off. It uses 320 and 160ksps. The latter at levels I could decode and confirm the spacecraft ID using @aang23.satdump.org's satdump once I tuned up a pipeline to do it. SCID = 0x02A7

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Scott Tilley @coastal8049.bsky.social · 01/02/2026

CHANG'E 6 has given me the slip! After an extensive search yesterday, I wasn't able to find in anywhere close or far from it's expected trajectory or around the Moon. I suspect the last known orbit was a transfer orbit into some sort of Earth/Moon resonance orbit...

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