[time-nuts] Time and frequency practical exercise 2018 late quarter; precision measure of 432mhz band Sat in Lunar Orbit
Ole Petter Rønningen
opronningen at gmail.com
Sat Nov 18 02:24:41 EST 2017
I am not a ham, but would be interested in participating if there is someone in my neck of the woods that needs access to timing gear. I am in western norway, near stavanger. I have a hydrogen maser and many other precision oscillators.
> 17. nov. 2017 kl. 22:26 skrev Patrick Barthelow <apolloeme at gmail.com>:
> From me, Pat a newbie, second post:
> A new project, STEM opportunity. A STEM/CitizenScience/Ham Space Science
> project. Kids welcome.
> In formative stages so this is for internal discussion, not for public
> announcements yet.
> Will do a frequency measurement of a Cubesat at about 437 mhz that will
> orbit the Moon in 2018.
> Can be received by modest yagi antennas while orbiting the moon.
> Challenge is to get/use/build precision frequency references and counters,
> and measure the carrier frequency. Cesium, Rubidium, MASER, GPS based,
> commercial standards, and their derivations all welcome.
> Have found 4 (and More) more hydrogen line masers in diverse locations
> around the world, who wish to participate.
> USA, Netherlands, South Africa, Australia, Mexico, and other locations have
> expressed interest.
> I am a member of Team Alpha Cubesat. We and some other teams are in the
> NASA CUBEQUEST challenge. Launching next year a 6u cubesat to lunar
> orbit. I am not an expert at the freq measurement aspect of this, so, I am
> a Newbie. With tons of questions, but I was surprised how quickly a check
> of the world's Hydrogen line MASERS got many to offer to come on board.
> MASER is overkill, but that is OK. The Chief Scientist of the project is
> in the USA and wants to make measurements to the HZ level, at 437 mhz so
> with MASERS and Cesium, Rubidium we are overkill but it could generate
> STEM/Citizen Science participation. That is what we are doing. So the
> satellite will be on 437.5 mhz plus minus doppler. We have to measure
> its received freq to 1 HZ or less. So I talked to the chief scientist,
> and we decided to go with a public STEM related program with it. [PLEASE
> DO NOT GO PUBLIC YET this is confidential for now.] Announcement of a
> competition for anyone to measure the frequency of the sat as it is in moon
> orbit. So I decided to check with about 5 geographically diverse located
> MASERS. ( Australia, South Africa, UK, Holland, Mexico and USA, and got
> or am getting buy-in from them to make the measurement. I was surprised
> they did not just say go away... a half million dollar MASER is, or should
> be busy with similar but necessary measurements from paying customers.
> Overkill, I admit, but it is a chance for Citizen Science publicity,
> Popular Science, STEM, etc..
> Anyway I got a bunch of MASERS to participate and will develop a website
> for people to measure the freq and send in their "answer". We will have
> (are looking for) sponsors that will pay prizes or wall paper awards, for
> very close accurate measurements.
> This is like a modern day Frequency Measurement Test that ARRL did years
> ago. I will in fact call ARRL to see if they want to play in this. I will
> CC others to see if they want to play. Other frequency references used may
> be commercial variations of
> Cesium Beam and Rubidium references. But the King Kong in accuracy is the
> MASER. I got to learn a bit about the MASER they had at Arecibo when I was
> there. And now know a school in Europe a Technical Instrumentation
> school, that offers a project to build a Hydrogen Line Maser using modern
> simpler, cheaper methods and hardware.
> Arecibo may play on this event next year. So, you only need modest yagis
> to pick up the Sat at moon distances on 437.5 mhz should be fun...
> The Goldstone MASER; above:
> See/Search Also:
> Precise Time and Time Interval Clocks Time Frames and Frequency, James R.
> Clynch Navy Postgraduate School.
> Introduction to Frequency Standards by Lindon Lewis
> Interested? Get back to me to start planning for the 2018 launch, and
> cubesat in lunar orbit, exact date not known.
> Best, 73, Pat Barthelow AA6EG
> apol <apolloeme at gmail.com>loeme at gmail.com
> *"The most exciting phrase to hear in Science, the one that heraldsnew
> discoveries, is not "Eureka, I have found it!" but:*
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