Frequently Asked Questions

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Question:
What is the flag mask?

Answer:
Three different items are represented by the mask: saturated, dead and flat pixels. The pixels in the flag mask can have several values:

0 = Normal data
1 = Saturated pixel
2 = Dead detector (unresponsive to light, with zero values)
3 = Flat detector (dead but register a constant value)
4 = Fill value (overflow, value exceeds calibration range)