Publishers version - DTU Orbit

Figure 182: (MTP5 radiometer - microwave receiver assembly (for courtesy concession of
ISAC CNR, Rome, Italy
Table 20: MTP-5P Technical Specifications
Parameter Value/characteristic
Microwave (passive) radiometer Single frequency angular scanning
Altitude range [m] 0–600
Altitude resolution [m]:
0 < H < 50 10
75 < H < 100 25
100 < H < 600 50
Accuracy of temperature profile [K or ◦ C] 0.5
Central measurement frequency [GHz] 60.4
Antenna bean width (at 3dB) [deg.] 0.5
Receiver sensitivity [K] 0.04
Integration time [s] 1
Measurement cycle [s] 300 (minimum)
Operational temperature [ ◦ C] −50–40
Calibration Self calibrating (internal and external sources)
Dimensions [mm] 900×900×870
proceduresisnecessaryonlyin alongperiodmaintenance’sinterventionandrequirea“tipping
curves” (i.e. steering the antenna off-zenith by rotating the flat reflector to observe emission
from a note source in a horizontal path) and/or radiative transfer calculations based on in
situ comparison measurements (Figure 183).
14.6 Antarctica Dome C experimental site Radiometric
measurements
In November 2002 a such MTP-5P radiometer was installed at the French-Italian Antarctic
plateau station of Dome C (75 ◦ 06’04” S, 123 ◦ 20’52” E, altitude 3233 m) (Figure 183). The
temperature profile measurements were provided from November 18 to December 17, 2002.
The outside ground-based temperature range was −23.4 ◦ C– −45.7 ◦ C during the measurement
period. The MTP-5P was installed at a height of 5 m above the Dome C surface and
was in normal operational mode for all the period. Between November 18 and December 9
the data from the MTP-5P external in-situ temperature sensor were used for calibration. For
the period December 9 to December 17 the data from the temperature sensor of a local me-
270 DTU Wind Energy-E-Report-0029(EN)