2-byte PhiDP Format (DB_PHIDP2)

PhiDP is defined as the 2-way measured phase effect after the signal has travelled through the intervening weather twice. Differential phase (PhiDP) in degrees is computed from the unsigned output with:

$Φ D P mod ⁡ 360 = 360 × N - 1 65534$

The overall range is 0 ... 360° degrees in steps of 0.0055 as follows. In cases where the transmitter was alternating polarization, or the data was converted from 1–byte format, the values only cover 0 ... 180°.

0	No data available
1	0.0000 deg
2	0.0055 deg
65534	359.9945 deg
65535	Reserved for area not scanned in product files