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So far so good...looks like it has reached max altitude or struggling to cut into the faster moving air...both.
As odd as it sounds,this flight was weighted down as not to exceed 10000m since this new GPS is known to fail.
Typically,this design should have flown @ 10500m...extra solar cells were used for low solar angle.
One thing also seen is the solar voltage stopped working.Maybe a bad solder joint...but at least it gets power.
8280m seems to be the max altitude...stretching of balloons may occur over time.
Jim

It's doing good, last spot shows almost 8300-meter altitude.

U3S20 is trying to grab solar energy...I think it runs the first WSPR TX and stops.Second TX made it to JT9 but see calibration is off by 100hz high on the waterfall.Altitude is good...no WSPR data yet.

1518?-26?-1.1?1749?@?CQ?N2NXZ?FN13

1519?-26?-1.0?1749?@?4332.9?35.34

Happy New Year to all.
This morning was an opportunity to launch U3S20 balloon.
Weather here in NY has been terrible and today was the best shot I had in weeks so took it.
Early launch and now have to see if it will power up in the sun once it rises more.Not sure what to expect using a new GPS.
30m WSPR x 2 / 30m JT9 x 2 (WSPR dial)
20m WSPR x 2 / 20m JT9 x 2 (14.078 dial)
Jim,N2NXZ