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Sarah Jamie Lewis Profile picture
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16 May, 7 tweets, 3 min read
It was a sunny day today so I did some more satellite captures. Fixed up the antenna a little, and also dug out an LNA and tested some passes with/without. I had 2 passes clobbered by METEOR-M2, and the rest were pretty low, but overall I think this setup is improving. ImageImage
Decided to stay out late since the last pass of the evening was pretty high, and I'm glad I did... Image
This the definitely the best capture I've ever had, the LNA definitely helps with the new antenna. I think if I could get it up a little higher it would do even better. I'd like to eventually build a QFH but the performance of the v-dipole is awesome considering the limitations.
The actual sensors on the satellite feed from the above were thermal infrared so here are some false colour images from that last pass. ImageImage
Another sunny day. Here is a low pass from this morning while I was setting up. Image
Another fairly decent twilight pass, this time without an LNA. ImageImage
Had another good pass today but the recording got corrupted by a software glitch, and the wind ended up wrecking another pass.

Have a few more satellite-related projects on my list, but I also want to (re)-build my radio telescope and I think I want to focus on that next.

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More from @SarahJamieLewis

Sarah Jamie Lewis Profile picture
16 May
The most important understanding I've come to involving cryptocurrency is that there exists are large portion of people who absolutely don't understand the point of decentralization (of power) and consider the expense of decentralization a defect (that they can "fix").
Prior to that, I had some ridiculously frustrating conversations regarding e.g. why some structure wasn't actually "decentralized" because the power was concentrated in some entity.

Then I realized that those teams weren't actually interested in decentralizing power.
Decentralization ultimately became a marketing term used to describe the number of entities involved in a consensus, rather than the mechanisms over which power was transferred to and between those entities.

A shame, but not unexpected.
Read 7 tweets
Sarah Jamie Lewis Profile picture
21 Apr
I see that we are talking about "Hypocrite Commits" again and I want to clarify a few things.

Despite what their paper says they didn't get an IRB-exemption until *after* they posted about their IEEESP paper acceptance and a group of researchers (inc myself) expressed concern...
Our complaints were based on the abstract and a screenshot of the first page of the paper. They have since published the whole paper:

raw.githubusercontent.com/QiushiWu/qiush…
They lied to people in order to assess their response, with no system in place for prior informed consent or debriefing.

That any IRB could conclude that it wasn't a deception study on human subjects speaks to the overall ability of many IRBs to reason about internet studies.
Read 12 tweets
Sarah Jamie Lewis Profile picture
19 Apr
Their right about one thing...we do need a debate reset.

End to end encryption provides some safety, but it doesn't go far enough.

For decades our tools have failed to combat bulk metadata surveillance, it's time to push forward and support radical privacy initiatives.
As an aside, I love the way that the NSPCC tell on themselves in this ridiculous report by contrasting the rights of children with the rights of "LGBTQ+ young people"

Refusing to even acknowledge the intersectionality of their own client base if a great way to provide "balance".
Anyway we do this dance every 6 weeks or so now, and I'm busy building actual privacy tools so I will let past-Sarah explain why all of this is bullshit.

Read 6 tweets
Sarah Jamie Lewis Profile picture
24 Jan
I regret to inform you that the tone in which I tweet about vulnerabilities in my free time has no bearing on how impactful that vulnerability may be to you.
The nice thing about public demonstrations of vulnerabilities is that you can't argue about them until you've fixed them, after that I don't particularly care if you think I should have been nicer about it.
I've been called every name in the book at this point, some not in the book, threatened with lawsuits, prison, one comedian even remarked that I look like I might have been burned at the stake after a disclosure.

Still here. Still doing what I do.
Read 4 tweets
Sarah Jamie Lewis Profile picture
23 Jan
Announcing my resignation from the Zcash ZOMG forum.zcashcommunity.com/t/announcing-m…
I didn't mention sexism in the post because I was afraid it would overshadow my primary point i.e. "Large amount of funding in this space should come with the expectation of responsibility"

But that has happened anyway so ¯\_(ツ)_/¯
Many in the Zcash community think it is a higher evil to notify users about unsafe software than it is to build unsafe software in the first place. Without substantial changes to that culture, I can't see how it has a future that people should trust.
Read 6 tweets
Sarah Jamie Lewis Profile picture
23 Jan
Promising security or privacy is a responsibility you shouldn't take lightly. It's not about your brand; it's not about you.

People will put their lives in your hands, it must always about their ability to consent, manage risk and reduce harm.
The only way to build a robust system is to open it up to the world. To have it be radically transparent from end to end.

It's a responsibility you shouldn't take lightly. It's not fast, or glamorous or easy.
We don't do those things because they are efficient, we do them because they are the right thing to do. To keep us accountable to those who entrust us with parts of their lives.
Read 4 tweets

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