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pierredv : meteorology   11

Global 5G wireless networks threaten weather forecasts - Nature, Apr 2019
The US government has begun auctioning off blocks of wireless radio frequencies to be used for the next-generation mobile communications network known as 5G. But some of these frequencies lie close to those that satellites use for crucial Earth observations — and meteorologists are worried that 5G transmissions from cellphones and other equipment could interfere with their data collection.
5G  NatureJournal  Interference  meteorology  NASA  NOAA 
may 2019 by pierredv
Glossary - NOAA's National Weather Service
"This glossary contains information on more than 2000 terms, phrases and abbreviations used by the NWS. Many of these terms and abbreviations are used by NWS forecasters to communicate between each other and have been in use for many years and before many NWS products were directly available to the public. It is the purpose of this glossary to aid the general public in better understanding NWS products."
glossary  terminology  NOAA  meteorology 
september 2018 by pierredv
Vorticity - tutorials
Vorticity Basics
Relationship Between Vorticity and Divergence
What is DPVA?
Vorticity Misconceptions
Pressure Troughs and Shortwaves
What is a Shortwave Trough?
What is a Negatively Tilted Trough?
meteorology  weather  tutorial 
september 2018 by pierredv
NOAA sees great promise and challenges in using data from small satellite constellations -
"As the National Oceanic and Atmospheric Administration looks ahead, the agency sees great promise in the observation capabilities of small satellite constellations but also significant challenges in terms of buying, validating and using the various types of data they provide."

"NOAA is concerned, for example, about whether data products from small satellite constellations will be available over the long-term and if so, whether prices will remain stable or fluctuate over time. ... Another significant challenge NOAA faces is in buying commercial satellite data while maintaining its commitment to sharing data freely with international partners, customers and researchers."

"Through its Commercial Weather Data Pilot program, NOAA is investigating the merits of small satellite data. The agency began by purchasing GPS radio occultation data and is in the early planning stages of a similar effort to purchase microwave sounding data and in the “pre-planning stage” of buying infrared radiometry data."
SpaceNews  meteorology  NOAA  space  space-commercialization  commerce 
january 2018 by pierredv
Spire Global is expanding cubesat constellation to offer persistent global view -
"Spire Global, the San Francisco-based company that operates 48 GPS radio occultation cubesats, could provide a persistent view of about 97 percent of Earth with a constellation of 150 satellites"

"A constellation of 100 to 200 radio occultation satellites, which provide detailed observations of atmospheric temperature and moisture, could be used in conjunction with geostationary weather satellites like NOAA’s Geostationary Operational Environmental Satellite-16 to dramatically improve the accuracy and spatial resolution of global weather prediction models, MacDonald said."

"Spire also is expanding its ground network. The company has 27 ground stations operating and is pushing to increase that number to 50 because the added ground stations will allow the firm to provide customers with data no more than 30 minutes old"

"In addition to using its spacecraft for meteorology, Spire’s cubesats carry Automatic Dependent Surveillance-Broadcast (ADS-B) payloads for aircraft tracking and Automatic Identification System (AIS) payloads for maritime tracking. “We collect about 10 million ship reports a day,” MacDonald said."
SpaceNews  Spire  EO  EarthObservation  cubesats  meteorology  ADS-B 
january 2018 by pierredv
Meteorology: Counting raindrops | The Economist Feb 2013
"rain can make it harder for certain sorts of electromagnetic radiation to travel through the atmosphere. Measure this impedance (and scrub out any other sources of variation) and you can measure how rainy it is. The researchers do not measure the strength of mobile-phone signals themselves. Instead, they piggyback on something that mobile networks already do, and measure the strength of the microwave links that base stations use to talk to each other."
cellular  microwave  TheEconomist  meteorology  rain  measurement 
march 2013 by pierredv

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