13 votes
Accepted

Regarding compression, shuffle filter of netcdf4

I made some pictures on my tablet to explain everything a bit better. Sorry that they are not that nice. Shuffle If we do not us shuffle, we store on value (float, double, integer, short integer, ......
daniel.heydebreck's user avatar
8 votes
Accepted

SEGD and SEGY recorded data

SEG-D is a specialized format, while SEG-Y is a general-purpose format. In general, SEG-D is intended for field recordings of seismic data, and SEG-Y is intended for 'seismic data exchange'. Having ...
Matt Hall's user avatar
  • 11k
8 votes

How to interpret these kind of coordinates?

After quite some research it turns out these are EPSG:3857 WGS 84 / Pseudo-Mercator coordinates. I found this out by visiting this website where you can transform coordinates from different systems.
Trup3s's user avatar
  • 141
7 votes
Accepted

How to open old GOES-1 satellite image files downloaded from NOAA CLASS

Unfortunately, the older weather satellite data is, the harder it is to read. Perhaps NOAA's Weather and Climate Toolkit can open it. The old stuff usually comes in tightly packed binary formats that ...
gerrit's user avatar
  • 11.7k
7 votes
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What is the relationship between raw seismic data, CMP Stacking, NMO & Machine Learning

SEG-Y files are a general purpose archival format. So they can be "anything". 2D seismic, 3D seismic, raw, processed, unstacked or even derivatives (seismic attributes). How to get information about ...
Way of the Geophysicist's user avatar
5 votes

NCEP reanalysis model levels

Grid Resolution of the NCEP/NCAR reanalysis data The data is available on different grids depending on the variables of interest: The original grid is a T62 Gaussian grid, which grid cells do not ...
daniel.heydebreck's user avatar
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
Accepted

How to convert specific humidity ERA5 in kg/kg to g/kg or mm/day?

The specific humidity of ERA5 data is kg/kg, but some articles work with this variable in g/kg. How can I convert this? Conversion from kg/kg to g/kg is as simple as multiplying by 1000. Or to ...
alex_danielssen's user avatar
4 votes

Format/interpretation of NOAA Elevation Data

If you can find a NetCDF file, I would recommend using it. NetCDF is a very common self-documenting format with libraries widely available for any language that is suitable for scientific data ...
gerrit's user avatar
  • 11.7k
4 votes

Why is satellite imagery data delivered as signed 16 bit integers?

Because the surface or top-of-the-atmosphere products are not raw data. Atmospheric corrections have been applied to the raw data and those corrections have been done with a precision that can't be ...
Camilo Rada's user avatar
  • 17.7k
4 votes

How to read NOAA/NASA GOES satellite data?

The same as scottlittle, but you can use also McIdas V. It also can read nedcdf files and also is a free software. http://www.ssec.wisc.edu/mcidas/software/v/documentation.html
J. Chira's user avatar
3 votes
Accepted

Why do values stored in data files, such as climate model output, appear to be high?

My professor gives the solution, as we can see at the site were the climatic variables came from http://www.worldclim.org/formats1: Please note that the temperature data are in °C * 10. This means ...
Emanuel's user avatar
  • 91
3 votes

How to open old GOES-1 satellite image files downloaded from NOAA CLASS

Since version 0.43.0 Satpy is able to read GMS-05 and GOES-09 data in VISSR archive format: https://satpy.readthedocs.io/en/stable/api/satpy.readers.gms.gms5_vissr_l1b.html
sfinkens's user avatar
  • 131
2 votes
Accepted

Storing borehole interval data (logs) in netcdf

tl;dr I would suggest considering the borehole measurements as a vertical profile. In terms of the CF Convention it would be a featureType ...
daniel.heydebreck's user avatar
2 votes

Get atmospheric pressure values through JavaScript

There are some problems with your request, and maybe some misunderstandings. Misunderstanding: You actually need more than pressure to get wind vectors. Wind speed is nonlinear, and is dependent on ...
BarocliniCplusplus's user avatar
1 vote

How do I read IASI GDS L1C in Python?

It seems you have downloaded a native format file. This is not an HDF readable format. If you see the first link you've given, under distribution it notes there are several formats you can download: ...
f.thorpe's user avatar
  • 13.6k

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