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Mentor: A. Kremer


FOGHAT is a humidity and temperature profiler (HATPRO) manufactured by RPG. It measures 7 brightness temperatures in the water vapor line (22.24 GHz) and 7 in the oxygen complex (60 GHz), the former brightness temperatures are used for water vapor profiling, the latter for temperature profiling. Measurements around the water vapor line are used to derive integrated water vapor (IWV) and integrated liquid water (LWP) content.
As of Oktober 2019, FOGHAT is deployed in a site south-west of France within the framework of the SoFog3D campaign and performs synchronous measurements with a mobile profiler which consists of a Vaisala CT25K ceilometer, a Vaisala WXT weather station, a METEK micro rain radar, an Ott Parsivel optical distrometer and an hemispheric camera. Together, the measurements are used to study physical fog processes and the evolution of fog events.


 Courtesy of Jan Schween

Left side: FOGHAT stationed at Iquique - CRC 1211. Right side: FOGHAT stationed at Saint-Symphorien within the SOFOG3D campaign.


Period Place Project
03/2018 - 03/2019 Iquique, Chile CRC 1211
10/2019 - today Saint-Symphorien, France (44°22'10.48“ N, 00°35'51.97” W) SoFog3D


  • If you are interested in receiving data please contact: U. Löhnert


Parameter Specification
Receiver 1 water vapor and liquid water absorption
Frequencies [GHz] 22.24, 23.04, 23.84, 25.44, 26.24, 27.84, 31.40
Channel band-widths [MHz] 230, 230, 230, 230, 230, 230, 230
Optical Resolution (HPBW) 3.3°-3.7°
Receiver 2 oxygen absorption
Frequencies [GHz] 51.26, 52.28, 53.86, 54.94, 56.66, 57.30, 58.00
Channel band-widths [MHz] 230, 230, 230, 230, 600, 1000, 2000
Optical Resolution (HPBW) 2.2°- 2.5°
Pointing Resolution 0.6° (elevation), 0.1° (azimuth)
Side-lobe level < -30 dBc
Size 630 mm x 360 mm x 900 mm
Power Consumption <120 W (350 W peak)
Weight 60 kg
Temporal resolution 1-2 seconds
instruments/foghat/foghat.1570121158.txt.gz · Last modified: 2019/10/03 18:45 by akremer