Questions tagged [field-measurements]

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Get NPK values of soil without spectroscopy

I stumbled upon this new device called Teralytic. Which can measure salination, NPK values and all sorts of things. Unfortunately it's sold out and I think when it'll be available again rather ...
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1answer
20 views

Transmitter receiver coil separation for Electromagnetic Terrain Conductivity Measurement

Why increasing transmitter-receiver coil separation in EM survey (EM31, also here) increases depth of penetration? Suppose there is a horizontal flat conductive layer underneath a flat resistive ...
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2answers
62 views

What was the lowest temperature ever recorded on the surface of Earth?

This article Lowest recorded temperatures lists a -89 Degrees Celsius in Vostok, Antartica as the lowest recorded temperature. However, this other article List of weather records lists a −93.2 °C (−...
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2answers
61 views

Young researcher hoping to volunteer for Antarctica fieldwork

I am a postdoctoral scholar who is interested participating in Antarctica fieldwork/exploration as a volunteer. My background is in biology, but I am happy to participate in any fieldwork ...
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1answer
108 views

Rainbow dynamics?

How would steam refract light compared to fog and how would the rainbow appear? Does the temperature of the water drop or ice crystal effect the rainbow in any way? I know the size of the water drop ...
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2answers
41k views

What was the highest temperature ever recorded on the surface of Earth?

The article entitled "54 Celsius degrees in Iran, the highest temperature ever recorded?" says 56,6 Celsius may be the highest temperature ever recorded, in Death Valley, California, and it also ...
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1answer
113 views

Are there “transparent” clouds?

Comments below this answer to the question Why are lightning towers at launch pads topped with big hollow tubes with spiral windings and not “lightning rod-shaped” lightning rods? link to a 2013 ...
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1answer
160 views

Is astrochronology a proper method?

Wikipedia's definition of astrochronology is: "Astrochronology is the dating of sedimentary units by calibration with astronomically tuned timescales, such as Milankovic cycles,1[2] or even ...
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1answer
79 views

Where on Earth is the highest none polar magnetic fields?

Is there anywhere that magnetic ore deposits are strong enough to have a magnetic field that would be stronger then Earths' magnetic poles by proximity? I'm not asking Where on Earth is the ...
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0answers
34 views

Where to find meteorological data from road stations?

I am involved on a project that aims to analyze data from road weather stations, like the ones you can see from a German site here: https://www.dwd.de/EN/ourservices/bufr_extensions_national/...
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2answers
6k views

Where on Earth is the magnetic field intensity stronger?

Are there places on Earth that have a strong magnetic field other than the magnetic north and south poles?
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1answer
2k views

SEGD and SEGY recorded data

What is the difference between a segd recorded data and a segy recorded data and can we convert from segd to segy and vice versa?
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1answer
546 views

How to make, read, and calibrate a ping-pong ball anemometer?

I'd like to make a ping-pong ball anemometer to make estimates or approximate measurements of wind and surface air currents at low to moderate speeds. I don't own an anemometer now, but I'd estimate ...
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1answer
574 views

How are data from tiltmeters used to monitor volcanic activity?

I've just learned in this answer that tiltmeters (which I assume measure changes in tilt) are used near active volcanos. (Saw a mention in item 4. here also.) What kind of geological (volcanological?)...
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88 views

Guidelines for locations of NTU markings on a turbidity tube

One way to estimate the turbidity of water while in the field is to use a turbidity tube. So far I've found two sources where I can get an idea of the locations of NTU markings along the tube. The ...