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35 votes
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Why aren't weather balloons left in the atmosphere permanently?

In addition to radiosondes that do a single ascent over a few hours, there are also driftsondes that stay in atmosphere for days or weeks, typically with their buoyancy set up to track a particular ...
Deditos's user avatar
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24 votes

Why aren't weather balloons left in the atmosphere permanently?

It depends on what each weather balloon is measuring; what data they are capturing. Most weather balloons are released as specific times during a 24 hour cycle. Such balloons measure altitude, ...
Fred's user avatar
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13 votes

Why aren't weather balloons left in the atmosphere permanently?

There are several reasons for this. One of them is air traffic concerns. The parts of the atmosphere that are interesting for weather (namely, the troposhere and lower stratosphere) also happen to be ...
reirab's user avatar
  • 303
12 votes

Why are the clouds white and Australia black in weather satellite infrared images?

I had a very similar question in a job interview! The only difference is that it was an image from SEVIRI on Meteosat. The imager on HIMAWARI is called the Advanced Himawari Imager (AHI). The AHI ...
gerrit's user avatar
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11 votes

Why are the clouds white and Australia black in weather satellite infrared images?

It is likely because there is already a conversion from the raw data to the grayscale image posted on the CWB website. From this online course (emphasis mine): [...] using the mathematics behind ...
Jean-Marie Prival's user avatar
8 votes

Why aren't weather balloons left in the atmosphere permanently?

The vast majority of weather balloons are designed to collect vertical profiles of the nature of the Earth's atmosphere. That would not be possible with a balloon that stays aloft at more or less ...
David Hammen's user avatar
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6 votes
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Are the images of city lights from GOES-East GeoColor based on real-time imagery?

No, it is not real-time imagery of city lights. As per the GOES Geo-Color Description (which should be at the bottom of the page you are on): GeoColor is a multispectral product composed of True ...
f.thorpe's user avatar
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6 votes
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How to open AVHRR files downloaded from NOAA CLASS?

You can use the Python library satpy to read AVHRR GAC data: ...
gerrit's user avatar
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6 votes
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Are these plane trails seen from satellite

Under the right conditions (in a basic sense, locally high relative humidity; see also this discussion on this site regarding contrail formation), the clouds initially formed by contrails may persist ...
dplmmr's user avatar
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4 votes
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doubt about the 'white spaces' in the maps from satellite

Expect every daily retrieval of AOD to have many missing pixels, mostly where clouds appear. Data is removed when the quality assurance flags do not meet some minimum criteria. This can happen when ...
f.thorpe's user avatar
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4 votes
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Convert satellite image data (GOES 15) into solar irradiance values?

It is far too complex a process to estimate surface irradiances utilising satellite data. No software takes just satellite images as input and gives out irradiances. I am pasting link to an article ...
Harish's user avatar
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4 votes
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In meteorology, are satellite data "better" than reanalysis data?

Unfortunately, your question has no answer. Both have errors. Both can be unreliable. Your choice really depends on how you plan on using them. Satellites instrument contain sources of error, such as ...
BarocliniCplusplus's user avatar
4 votes

Introductory course on interpreting GOES-R satellite images?

There are numerous short modules offered by UCAR's COMET/METED website: https://www.meted.ucar.edu/training_detail.php Modules specific to GOES-R include (but aren't limited to): GOES-R/JPSS test ...
BarocliniCplusplus's user avatar
4 votes
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What is this warm circle in the middle of Russia?

Interestingly, there is a pressure anomaly that corresponds with the temperature anomaly. The pressure of the spot is about 30 hPa lower that the surrounding region indicating a localized low pressure ...
Fred's user avatar
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4 votes
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Wind animation from satellite

The data that you are seeing is the wind speed the models predict at 10m above the 'model surface'. 10m is the standardised height at which wind is measured, as defined by the World Meteorological ...
Mehmet Karatay's user avatar
3 votes

What is this warm circle in the middle of Russia?

Personally, I believe it to be an interpolation artifact. I have been looking at the land surface temperature (LST) from multiple satellites that have a resolution of 1km and there is nothing that I ...
arkaia's user avatar
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3 votes
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The motion of the upper-level outflow of a typhoon

It's hard to see but it's definitely there in your example. You can see some upper-level clouds in the South-Southeast quadrant of the storm moving away from the center in somewhat of an anticyclonic ...
mEXsACHINE's user avatar
2 votes

Looking for global cloud cover animations or videos

That kind of "moving clouds animation" is a very common one, as it is used routinely to aid in weather forecasting. However, it is not very common to see it in a whole-world geographic projection as ...
Camilo Rada's user avatar
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2 votes
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Where can I find archived night microphysics images from EUMETSAT? I

I think only the Day microphysics RGB composite is a standard EUMETSAT product. However, the night microphysics RGB is available from other data portals like the ePort by Eumetrain.org. There you can ...
Camilo Rada's user avatar
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2 votes
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Is cloudfraction a proper measure of gaseous data expanse?

No, cloud fraction is not a good measure of $\ce{SO_2}$. Clouds are functions of moisture, temperature, and cloud condensation nuclei. Som of the other variables, such as (but not limited to) ...
BarocliniCplusplus's user avatar
2 votes
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Understanding the color coding of a weather map

Unfortunately it's common for satellite data services to show these types of images qualitatively, omitting the units or even a colorbar. This is an infrared image from the 10.8 micron channel (TIR1) ...
Deditos's user avatar
  • 3,960
2 votes

How to open AVHRR files downloaded from NOAA CLASS?

AVHRR does not capture green or blue so making an RGB image is not possible. Your colorized example looks like a false-color representation of AVHRR NDVI images using a green to purple color band to ...
user28239's user avatar
2 votes

How to open AVHRR files downloaded from NOAA CLASS?

As you can see, it isn't very good. From my perspective, it is very good. The raw data is AVHRR data scanned on a line-by-line and pixel-by-pixel sense. To make better sense of that data you might ...
David Hammen's user avatar
  • 23.7k
2 votes

Total Cloud Cover% from NOAA inverted?

I wasn't as quick to be convinced, but looks like this GFS model plot of simulated IR satellite over the previous hour for 1Z on the 2nd (so basically the same time as your image) verifies it's not ...
JeopardyTempest's user avatar
2 votes

Why aren't weather balloons left in the atmosphere permanently?

There are such things as zero pressure balloons, they are thin, pliable, and are not a continuous enclosed space, so they auto equalize pressure and work much such like a helium filled parachute. In ...
Sabre's user avatar
  • 121
2 votes
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How to download atmospheric/oceanographic data for a given region in the sea?

If you want satellite data, you could use the Copernicus system, which won't, however, provide you with the required variables, but the measured variables directly AFAIK (irradiance in various ...
hschoell's user avatar
  • 380
1 vote

Total Cloud Cover% from NOAA inverted?

I assume that that the total cloud cover % is inverted? No, it's not. As gerrit mentioned in a comment, about 70% of the Earth is covered by clouds at any point in time. Science fiction movies and TV ...
David Hammen's user avatar
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