# Tag Info

## Hot answers tagged weather-satellites

12

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 IR1 channel is actually channel 13 with a central wavelength of 10.4 µm, which is in the window region (apparently it's called IR1 in reference to an older ...

11

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 the laws of radiation, computers can convert the amount of infrared radiation received by the satellite to a temperature (formally called a "brightness ...

11

There are a couple reasons for this. First, Lake Michigan is still cold this time of year, relative to the land that surrounds it. Warm air flowing over the lake will exchange heat and cool, reducing its buoyancy, which will alter the heights at which clouds will form and inhibit lift for surface parcels to achieve that height. That helps explain the ...

11

The WMO OSCAR database is a list of all Earth observation satellites¹. The resulting table can be sorted by orbit type, status (inactive/operation/planned), agency, and other aspects. From their own description: This table shows all known past, current and future satellites for meteorological and earth observation purposes.It can be sorted by clicking ...

7

From Scripps: [The] latitudinal differences in fluctuation are the result of photosynthetic activity by plants. As plants begin to photosynthesize in the spring and summer, they consume CO2 from the atmosphere and eventually use it as a carbon source for growth and reproduction. This causes the decrease in CO2 levels that begins every year in May. Once ...

6

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 for hours and spread outwards to form larger areas of cirrus cloud. Additionally, NASA's Contrail Education Project website has some specific examples here ...

5

HIRS is an old NASA heritage design that flew on both European and US weather satellites as part of the EUMETSAT/NOAA Initial Joint Polar System. The Inrared Atmospheric Sounding Interferometer (IASI) will take over the duties of HIRS, since IASI is a more powerful instrument with European design for a European satellite. You can see this discussed here: ...

4

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 bad observations (wildfires in the NIR), mapping problems (especially near the poles), and representation error. Don't underestimate those sources of error- ...

4

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 cases for convection initiation and wildfires. Advanced Baseline imager A satellite foundational course There are 19 courses with GOES-R in the title.

4

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 the retrieval is contaminated (e.g. from clouds or sun glint on the surface). If you are interested, you can obtain raw level-1 and level-2 data with all data, ...

3

You need to go this site - Himawari Archive and then it depends on what category of user you are and then obtain the imagery that way. UPDATE - On OP's request I am recording the information I got from JMA when I wanted to access Himawari's images. You need to specify what kind of user you are a) research b) commercial. Presuming research you can ...

3

I queried Wikidata for "instance of" = "weather satellite" and came up with this list: http://tools.wmflabs.org/wikidata-todo/autolist.html?q=CLAIM[31%3A209363%2C0%3A%28%29] Please remember that Wikidata still needs a huge amount of work, before queries can be judged accurate and complete (The project just started 2 years ago). If you need help improving ...

3

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 that describes algorithm to convert geostationary satellite measurements to surface reaching solar irradiance. Gadhavi et al., 2008; doi: 10.1029/2007JD009308 ...

2

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 the example you show, I'll elaborate later on why that's the case. Traditionally, a common source of "cloud animations", have been NOAA's geostationary GOES ...

2

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 access and visualize current or archive night microphysics RGB composites. The Java version works better for me, this is an screenshot of how it looks:

2

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) ColumnAmountSO2 or ColumnAmountSO2_TRLare better indicators.

2

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) of INSAT-3D. That website you link to is a bit misleading because (for me at least) following the link puts the text describing the 0.65 micron visible channel ...

1

This is a placeholder answer in anticipation of (1) the question being closed before I can write a valid answer, and (2) I will replace this placeholder with a valid answer. I have now partially filled in the placeholder, but what I wrote obviously still needs references. The hope is that precision agriculture will be the basis for the next Green ...

1

Your question is extremely broad and it would be comprehensive to answer in detail. How it is done varies from one application to another. But in general, all weather forecasts come from a numerical prediction which is based on an analysis. The analysis is created by combining a prior (the previous forecast) with observations. There are many ways this can be ...

1

This work intend to consolidate climate data series from 79 stations in North Africa and the Middle East, between the 19th century to present day. Distribution of the stations are shown in Figure 1: One challenge they had was an amount of incomplete records in the available dataset during that studied lapse. Table 1 and 2 show the name and location of the ...

1

Try VentuSky. An interactive map with different models and data visualization that can be adjusted easily.

1

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.

1

The Real Earth server from SSEC seems to be a good choice. https://realearth.ssec.wisc.edu/doc/dataaccess.php

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