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6 votes

Strange Circular Rays showing up on radar

These appear to bursts of electromagnetic interferences (EMI). The rays are all centered on the location of the weather radars. As the weather radars rotate and receive interference they interpret ...
GrapefruitIsAwesome's user avatar
6 votes
Accepted

How does ice-penetrating radar "see" through kilometers of ice without being absorbed?

Water molecules do interact with microwaves and in microwave ovens that operate at 900MHZ- 2.5GHz. This Radar instrument operates using Very High Freq Radio Waves at 193MHz [1]. At lower-than-...
potatasbravas's user avatar
5 votes

Can weather radar be used to track swarms other than mayflies?

This Weather Channel story gives a lot of things that show up on NWS radar... such as bats Or even vehicles on the highway: I believe the conditions typically have to be just right atmospherically ...
JeopardyTempest's user avatar
5 votes

Can weather radar be used to track swarms other than mayflies?

Swedish scientists have used the Movable Atmospheric Radar for Antarctica to detect birds, which showed up in their radar echo. I remember that they were talking about teaming up with ornithologists ...
gerrit's user avatar
  • 11.7k
5 votes

Why can't radar's decibel scale be used to determine the intensity of snowfall?

Snow, unlike rain, has holes as well as different refractive properties. This allows the radar beam to penetrate and reflect the beam differently than an ordinarily oblate rain drop.
BarocliniCplusplus's user avatar
5 votes

How does ice-penetrating radar "see" through kilometers of ice without being absorbed?

When electromagnetic waves travel through a medium, it can interact with the medium in question. But that interaction depends on the electric properties of the medium. Ice, being a dielectric medium, ...
Mingthondraba Bill's user avatar
4 votes

Radially symmetric rainfall radar pattern?

This is a measurement artifact, perhaps due to aeroplanes or misconfigured Wi-Fi. Weather radar detects not only precipitation, but also aeroplanes, birds, insects, wind turbines, mountains, and high ...
gerrit's user avatar
  • 11.7k
4 votes
Accepted

What is the use of HV or VH polarization in Radar?

In the case of a ground looking radar, the cross-polarized signals HV and VH generally increase with surface roughness. For example, dense vegetation is one of the more depolarizing surface types ...
Reed Espinosa's user avatar
4 votes

Why can't radar's decibel scale be used to determine the intensity of snowfall?

The returned energy which is measured by the radar is given by the so-called "radar equation" which states that: $P_r=\frac{CK_w^2}{r^2}\sum_{i=1}^Nn_iD_i^6$ Here $C$ is "just" ...
Whir's user avatar
  • 451
4 votes
Accepted

Giant Cavern the Size of Manhattan Under Thwaites Glacier in West Antarctica - how was satellite and airborne radar data combined?

The paper basically combines multiple datasets to figure out the changes in ice surface elevation and ice thickness at tidal and multi-year timescales. That way they were able to study grounding line ...
Camilo Rada's user avatar
  • 17.7k
3 votes

Help understanding radar data in subglacial lake complex beneath Devon Ice Cap

In the figure: The top panel is the radar gram measured in depth below ice surface (m). It is flat because when you do the measurement it starts from the surface which is 0m. The distance from the ...
potatasbravas's user avatar
3 votes
Accepted

Can I use radar data to estimate snowfall, or is there a better way?

Full disclosure: Being in Florida, I don't spend as much time watching winter weather, and don't have great experience correlating radar precipitation totals to actual snowfall. Is it spring yet? ...
JeopardyTempest's user avatar
3 votes
Accepted

Need help understanding rain rate formulas from drop sizes

The first equation does not match up with the units. But first things first... What you're calculating when you calculate rain rate is an accumulation rate, which is volume flux through a plane (mass ...
ssorg's user avatar
  • 66
3 votes
Accepted

Circular rain cloud observed in rain radar

A way to check if those clouds and precipitation are real is to check the same area and time with another radar. This is the image loop of Sidney (Terrey Hills) radar for the same time (the same you ...
Pere's user avatar
  • 829
3 votes

What are these lines that I frequently see on doppler radar?

If they propagate outward from thunderstorms, they are outflow boundaries. Cold air flows down from the thunderstorm with precipitation and spreads outward upon hitting the ground. This air moves ...
Bob Smith's user avatar
  • 139
2 votes

Why is Venus so cracked?

I found the picture with a small write up on a JPL site. It's a picture of the Aine Corona with pancake domes. P-38340 MGN-48 5/21/91 This Magellan radar image shows a region approximately ...
Fred's user avatar
  • 24.7k
2 votes
Accepted

How does SMAP detect soil statistics?

The SMAP includes both an active L-band synthetic aperture radar and a passive microwave radiometer. Any object above a temperature of absolute 0 will emit thermal radiation over a wide range of ...
Brian Borchers's user avatar
2 votes
Accepted

Has PAZ satellite been launched?

The launch was scheduled for 2017 using a DNPER launch vehicle. It seems that the contract contract between Kosmotras and Hisdesat was canceled and that resulted in an uncertain launch date. The ...
arkaia's user avatar
  • 15.5k

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