integer overflow when calculating azimuth in FURUNO scn files

[giacant]

• xradar version: 0.4.0
• Python version: 3.11
• Operating System: Ubuntu 22.0.4

Description

Problem with calculation of the azimuth values in a specific file at these lines:

xradar/xradar/io/backends/furuno.py

Lines 365 to 366 in 6880b0c

	self._data["azimuth"] = np.fmod(
	angles[:, 1] + self.header["azimuth_offset"], 36000

1010_radar.scn[22020].gz

What I Did

If you look this post, you can see what i did

https://openradar.discourse.group/t/problem-with-snc-file/335/3

[kmuehlbauer]

OMG, what a terrible bug. Here we have a nice example of integer overflow.

My guess why this did not surface earlier is, that the azimuth_offset was always less than 29526 (65536 - 36000).