It appears that the RH sensor heating circuit on this sonde failed about 24 minutes into
the flight. The RH values look reasonable, though somewhat noisy, from the surface to
approximately 6.9 km (439 hPa) at which point they begin to oscillate between 0 and 100 %.
This behavior stops when the sonde reaches approximately 11.5km (232 hPa) when the air
temperature drops below -40 degC. The oscillation stops at that point, though the RH
remains higher than might be expected even under supersaturated conditions.