That could let you know if you might possibly see the data come in later. It might be able to let you confirm that an aircraft is possibly in the air if reconnaissance messages are not available. Sometimes they might not have any data or intermittent data. Some of these sites might have data when the aircraft is near land and not have data when the aircraft is further away from land. When observations in our recon system are not available, you may want to check these links to see if these sites have tracking data for the plane you want to locate. Some might show the location of the aircraft and perhaps the altitude and speed of the aircraft. ![]() These sites don't contain meteorological information about a storm that the aircraft might be in or around. This site has a lot of other floats that you can access from the main page. You can also view a comparison here of the size of these kinds of floats compared to ordinary dropsondes. You can also view some information here in a series of tweets from a hurricane hunter about the floats. You can view a research article here, entitled "Ocean Observations Under Two Major Hurricanes: Evolution of the Response Across the Storm Wakes" about the usage of these floats. From the documentation in a PDF file here, it "is capable of 200 cycles to 1200 meters". These floats allow for depth profiles to be taken repeatedly. These can be dropped ahead of a storm so that they can measure the water temperature before and after passage of a storm. The Air Force hurricane hunters have already been using these. You can view a short YouTube clip here which shows one being dropped. The article is from March 2021 and is about when NOAA was testing them. You can view current ALAMO float data in Google Earth by downloading the file here. "The floats will measure temperature, salinity, and pressure in the upper 300 m of the ocean, profiling every 1-2 hours for several weeks." The hurricane hunters will at times drop these floats from their aircraft. Bottom: Test deployment of ALAMO float from P-3 aircraft (Credit: NOAA) Top: Screenshot from Google Earth of ALAMO floats deployed for Hurricane Teddy in 2020. (though sometimes the numbering starts with 0 and sometimes 1) You may also find obs for a short period of time in the "incoming" folder here before they are removed. The next character is the aircraft type (H: N42RF I: N43RF N: N49RF) and then a flight number that is probably there to separate multiple missions that occur on the same day for that aircraft. The first 8 digits of the folder name are the date group. ![]() An archive of some of the observations from NOAA P-3 and G-IV aircraft exists there, with each folder name reflecting a particular mission in which you can find obs in. If NOAA observations do not appear to be transmitted to the places they normally are, you may want to try going to the "sent" directory here. This site is where our site used to get NOAA P-3 radar data from, before their lower fuselage radar was upgraded and the data was no longer available in a format our site could easily process. There is a massive amount of raw data available on this server and some of that data is available in real time. This site contains data for NOAA aircraft.
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