Category: GravityNotes

Piezoelectric film and fiber, Three Axis, High Sampling Rate Gravimeters for Imaging Arrays

Richard K Collins All Sky Cameras, Collaborative Global Model of the Sun, Gravitational Engineering, GravityNotes, Sun Moon Vector Tidal Signal, Visualizations Simulations February 24, 2022

https://hackaday.io/project/164550-low-cost-time-of-flight-gravimeter-arrays/log/203460-piezoelectric-film-and-fiber-three-axis-high-sampling-rate-gravimeters-for-imaging-arrays I have not posted updates here for a while, but I work on this continually. The latest possible technology that I will be trying to adapt is related to piezoelectric films and piezoelectric fibers. I have seen several efforts to use piezo disks, but not these films. As I am reading the history of these materials
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More Gravimeters, now with piezo film and single lens interferometers

Richard K Collins Gravitational Engineering, GravityNotes, Sun Moon Vector Tidal Signal February 23, 2022

https://www.researchgate.net/project/iLens-Interferometer-towards-a-new-class-of-frugal-devices I’m interested in this research – could you provide the full-text for it? – Richard Collins I was searching arxiv.org for “piezoelectric film” “piezo film” which can be used for low cost vibration and acceleration measurements. I want to use it for a sensitive three axis gravimeter at high sampling rates. I found your
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Note to SETI – Is anyone searching the gravitational signals?

Richard K Collins All Sky Cameras, Collaborative Global Model of the Sun, Electromagnetic Gravitational Field, Gravitational Engineering, GravityNotes, Intelligent Algorithms, Visualizations Simulations February 21, 2022

When I was at the University of Maryland at College Park in the late 1970’s I met Joe Weber and Charles Misner and others who were starting gravitational wave detection. So I have followed it over the years. I think it very unlikely that aliens would be using the very narrow band of electromagnetic signals
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Comment on Earthquake Seismograph Using Bismuth Magnetic Levitator – about state of the art in low cost gravitational detector arrays

Richard K Collins Collaborative Global Model of the Sun, Electromagnetic Gravitational Field, Gravitational Engineering, GravityNotes, Solar System Colonization, Sun Moon Vector Tidal Signal November 3, 2021

Earthquake seismograph using bismuth magnetic levitator as sensor at https://www.youtube.com/watch?v=aIANNzpec7Y Tomislav Stimac, The “standard” still for accelerometers is the small but global network of super conducting gravimeters (SGs). They use liquid helium cooled niobium magnetically levitated spheres as the test mass. The sensitivity is about 0.1 nanometers per second squared (nm/s2) at 1 sample per second.
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Comment on Video about laser interferometer design and use – replace superconducting gravimeters

Richard K Collins Experimenting, Gravitational Engineering, GravityNotes, Schools, Universities, Learning and Working, Sun Moon Vector Tidal Signal August 26, 2021

Counting Atoms with the Doppler Effect – Heterodyne Interferometer by Sam Zeloof at http://sam.zeloof.xyz https://www.youtube.com/watch?v=vPu6lN9yJOY Sam, I sent you an email about using this to replace the network of superconducting gravimeters with something more people can afford. You have several orders of magnitude available to you by very small adjustments. SGs cost several hundred thousand and
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Plans for measuring the speed of gravity again, using superconducting gravimeter and related sensor networks

Richard K Collins All Sky Cameras, Electromagnetic Gravitational Field, Gravitational Engineering, GravityNotes, Open Algorithm Development, Schools, Universities, Learning and Working, Sun Moon Vector Tidal Signal August 26, 2021

One linear regression is all that is needed to useg JPL Ephemeris to separate the sun moon from earth-based signals I want to repeat the SG network speed of gravity measurement I did in 2003 using all the current stations. I will also use the best of the broadband seismometers from IRIS.edu. Any absolute measurements,
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Some Notes on applications for MEMS gravimeters and their global calibration

Richard K Collins Gravitational Engineering, GravityNotes, Open Algorithm Development, Sun Moon Vector Tidal Signal August 6, 2021

Marley, For the last 20 years or so, I have been tracking gravimeter developments, hoping one day they could be developed enough to use in low cost gravitational imaging arrays. I don’t have my notes on what I wrote to you. My memory is that I saw you were at “earth tide” sensitivity. That is
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Gravity and Temperature, gravity and pressure

Richard K Collins Electromagnetic Gravitational Field, Experimenting, GravityNotes, Radiation Channels July 17, 2021

Shawn, What I am saying is that the energy density of the radiation field of the earth, which you can map by mapping the temperature is just “gravitational field stuff”. The magnetic field of the earth which you can convert to magnetic energy density is also made of “gravitational field stuff”. The gravitational field of
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Gravitational, Magnetic and Electric Field Changes from Global Climate Change

Richard K Collins All Sky Cameras, Collaborative Global Model of the Sun, Electromagnetic Gravitational Field, Gravitational Engineering, GravityNotes, Radiation Channels, Symbolic Mathematics July 17, 2021

I wrote yesterday about magnetism and gravity and temperature at gravimeter and related sensor array detector sites. I give averages over all frequencies, but the fine details can be tracked across all frequencies from picoHertz to ZettaHertz. Relation between gravity, magnetism and temperature at the earths surface at /?p=1893 Today I realized that if global
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Comment on Endaq Steve Hanly blog about accelerometer sensitivity

Richard K Collins Collaborative Global Model of the Sun, Electromagnetic Gravitational Field, Gravitational Engineering, GravityNotes, Open Algorithm Development, Schools, Universities, Learning and Working, Solar System Colonization July 17, 2021

Accelerometer Specifications: Deciphering an Accelerometer’s Datasheet by Steve Hanly https://blog.endaq.com/accelerometer-specifications-decoding-a-datasheet I see you mention temperature sensitivity. I am writing an article on gravimeters and recommending different ones. Someone estimated their response to temperature. It can be estimated for gravimeter arrays. Here is how I estimated it. Relation between gravity, magnetism and temperature at the earths
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