Dual Polarisation Rain Radiometer (DP-RR) for thick cloud and rain LWP

The RPG DP-RR instrument is a stand-alone system for automated weather-station use under nearly all environmental conditions. This instrument observes at 3 or 4 frequencies with 2 orthogonal polarisations (6 or 8 channels in total).

With orthogonal polarisation information and brightness temperatures at 6, 10, 19, and 36 GHz this instrument is dedicated to the observation of raining clouds. Polarization effects on non-spherical hydrometeors can be observed with this kind of instrument. This instrument observes at 3 or 4 frequencies with 2 orthogonal polarisations (6 or 8 channels in total).

Frequencies:

6, 10, 19, 36 GHz, each at two orthogonal polarisations

Retrieved data types:

• Rain Liquid Water path (LWP-R)
• Cloud Liquid Water path (LWP-C)

• Radiometric resolution: 0.2 K RMS at 1.0 s integration time
• Absolute system stability: < 1.0 K
• Receiver and antenna thermal stabilization:
• Environmental temperature range for operation: –30 °C to +45 °C
• Integrated PC on-board
• Stand alone operation
• Data storage and backup on-board, power-failure safe-guard
• Low maintenance (3 months intervall for absolute calibration using LN2)
• Power supply: 85 to 265 V AC (at 47 to 63 Hz), or 120 to 330 V DC
• Power consumption: 350 W turn-on power, 150 W under stabilized conditions