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21 votes

What is this Sun and moon photographic anomaly?

The apparent anomaly, known as the Lunar Terminator or Moon Tilt Illusion, is indeed a matter of perspective. A brief explanation can be found here: http://chrisjones.id.au/MoonIllusion/ The essence: ...
Esquared's user avatar
  • 211
8 votes

What is this Sun and moon photographic anomaly?

Here my wife holds a globe with the moon in view. I carefully processed in a bit-mode to find the curve of light on the globe and drew perpendicular lines. Plainly we can see that the moon-lite side ...
Eric Reiter's user avatar
6 votes

Plotting the wind direction in 3D?

The context I often see the u,v,w components shown in one plot are forward and backward trajectory plots like those from the NOAA HYSPLIT Model, which provides separate panels for horizontal and ...
f.thorpe's user avatar
  • 13.6k
5 votes

Why is there a logarithmic grid on this plot?

It's a mistake. You probably know this, but for anyone who's interested, these wireline logs are: DRHO — density ('RHO') correction (delta, or 'D') in g/cc. DPHI — porosity ('PHI') from density ('D')...
Matt Hall's user avatar
  • 11k
5 votes

Plotting the wind direction in 3D?

Try quiver3 function in Matlab. For example, this is the example in Matlab's website for this function:
Ozcan's user avatar
  • 161
5 votes
Accepted

Rainbow dynamics?

Short answer: the refraction of light is ultimately dependent on both temperature and exact composition of the medium (e.g., liquid water or ice) through which it passes. Note: strictly speaking, "...
dplmmr's user avatar
  • 1,144
5 votes

Is there a publicly accessible resource of video/image footage of the sky over an entire year?

It may be more than you want, and more terrain-focused, but UC San Diego's High Performance Wireless Research and Education Network (HPWREN) has an archive for each of dozens of fixed-angle Southern ...
jeffronicus's user avatar
  • 3,487
4 votes

What is this Sun and moon photographic anomaly?

You can see this effect on the powerline above the railroad tracks in the picture you posted too, it doesn't look straight, even though it likely was in reality! The straight line between the sun and ...
Erik's user avatar
  • 1,999
3 votes

What is this Sun and moon photographic anomaly?

When looking at the sky, spherical coordinates are used as a convenience. We turn our head and body in azimuth and altitude to compare the position of objects. In this regards, the sky looks like a ...
JohnHoltz's user avatar
  • 262
3 votes

Websites providing visual weather data

For forecasting, there is a ton of data on the internet. Here are just a few sources. A Penn State professor compiled a list of weather websites on a webpage called National Weather Connections. I'd ...
BarocliniCplusplus's user avatar
3 votes

With the Earth revolving around the Sun , is there some [invisible] "tail" like Shooting Stars & Comets have?

A different take to the dust tail answer - Earth has a very well known "invisible tail": the magnetotail. Earth's internal magnetic field compresses ahead of the Earth in its travel around ...
WJB's user avatar
  • 976
2 votes

With the Earth revolving around the Sun , is there some [invisible] "tail" like Shooting Stars & Comets have?

(1) Strangely , Earth has a Dust tail though it is not similar to the Comet type ! A Comet will have tails made of Matter coming out of the Comet itself. Earth has a tail which not made of Dusty ...
Prem's user avatar
  • 211
2 votes
Accepted

How can I implement a visualization of archived convective data from numerical weather models?

The best model archive I know of offhand is Iowa State Meteorology's Gempak model data in their MTArchive. Looks like model-wise, they have at least 10 years of GFS (and the predecessor, the AVN). ...
JeopardyTempest's user avatar
2 votes

How to plot a Hovmoller diagram in MATLAB?

Here is an example using contourf. The trick is in sampling the 3D arrays appropriately: ...
arkaia's user avatar
  • 15.5k
1 vote

What is this Sun and moon photographic anomaly?

Here is what you do. Look at the moon. See which way the sunlit face of the moon is pointing, not in a picture but in a real-life view of the moon. Using your own perception, trace a line ...
Bruzote's user avatar
  • 199
1 vote

Looking for fun and illuminating weather visualizations

Try VentuSky. An interactive map with different models and data visualization that can be adjusted easily.
Communisty's user avatar
  • 1,064
1 vote
Accepted

Looking for fun and illuminating weather visualizations

Try Windy.com It looks very similar to the EarthWindMap, but appears to offer more controls. It is simple to change the heights and what variables are of interest.
f.thorpe's user avatar
  • 13.6k
1 vote

Websites providing visual weather data

VentuSky: Uses ICON, GFS, GEM (global) and HRRR (US) models with respective forecast times 4, 9, 9 and 2 days respectively. Map can be played as animation. Animation and weather map settings can be ...
1 vote

Plotting the wind direction in 3D?

How about using the same 2D wind rose plot for an additional figure, but color it with respect to velocity in the vertical? So you will have two of the similar looking wind rose plots, they will both ...
ZZZ's user avatar
  • 572
1 vote

What kind of data is best shown in a rose diagram?

In seismic acquisition and processing rose plots are essential. Another way to think of these plots is "angular histograms." This article article shows rose plots for a subsurface point using this ...
dergeophysiker's user avatar

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