Did a little off-trail hiking last weekend in a wilderness area bordering Anza Borrego State Park. Along the way we saw a water bottle and a can, both in rather inaccessible spots. Makes one wonder what people who go out of there way to get away think when they leave stuff behind. Of course it's also possible that the items were simply lost. I've lost stuff from the side pockets of the backpack in the past.
But all this is not the reason for this post. We also found something rather unusual:
Looked like a weather balloon radiosonde to me. After getting back home I did a little research and it looks like it's a model from the early 1970's. Depending how long these things stay on the shelf before they are deployed and how long this model was popular this thing could have been out there for some 40 years.
Here are some sources that helped me to come up with the dating guess:
Radiosonde Museum The guy has the model we found in his collection (Pic)
NOAA site That page contains the quote "Less than 20 percent of the approximately 70,000 radiosondes released by the NWS each year are found and returned to the NWS for reconditioning". I had no idea they use that many and now I wonder why I haven't come across one before.
There are about a 100 stations, 2 launches a day, stuff adds up.
But all this is not the reason for this post. We also found something rather unusual:
Looked like a weather balloon radiosonde to me. After getting back home I did a little research and it looks like it's a model from the early 1970's. Depending how long these things stay on the shelf before they are deployed and how long this model was popular this thing could have been out there for some 40 years.
Here are some sources that helped me to come up with the dating guess:
Radiosonde Museum The guy has the model we found in his collection (Pic)
NOAA site That page contains the quote "Less than 20 percent of the approximately 70,000 radiosondes released by the NWS each year are found and returned to the NWS for reconditioning". I had no idea they use that many and now I wonder why I haven't come across one before.

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