Physical Oceanography, Vol. 15, No. 3, 2005
EXPERIMENTAL AND FIELD RESEARCH
FIELD STUDY OF THE SPACE UNIFORMITY OF METEOROLOGICAL AND
WAVE PARAMETERS IN THE COASTAL ZONE. ON THE PROBLEM OF
CALIBRATION OF A SIDE-LOOKING RADAR ON THE SICH-1M SATELLITE
AS AN INSTRUMENT FOR MEASURING WIND VELOCITY OVER THE SEA
V. A. Dulov, A. N. Bol’shakov, V. E. Smolov, and M. V. Ivanchik
We study the problem of subsatellite calibration of a side-looking radar (SLR) of the Sich-1M
satellite regarded as an instrument for the evaluation of the velocity of surface wind and discuss
the possibility of application of the meteorological and wave parameters measured from the sta-
tionary oceanographic platform of the Experimental Department of the Marine Hydrophysical
Institute (Ukrainian Academy of Sciences) for their evaluation in the remote regions of the sea.
These regions can be observed with the help of the SLR without errors introduced by the appear-
ance of the coast in elements of space resolution. To prove the indicated possibility experimen-
tally, we perform simultaneous measurements of the water and air temperatures, wind velocity,
and the characteristics of waves both from the platform and in the water area neighboring with
the platform on the side of the sea at distances of up to
km. The quantitative estimates of the
degree of space uniformity of the analyzed parameters are deduced under the conditions of stable
inshore wind. A conclusion is made that the platform can be used for subsatellite measurements
aimed at the validation and improvement of the algorithm of reconstruction of the velocity of
surface wind by using the SLR of the Sich-1M satellite.
In the calibration of microwave satellite-based equipment and control over this equipment by using the data
of synchronous subsatellite measurements, it is assumed that the meteorological and wave parameters are uni-
form inside the elements of space resolution of the equipment. Thus, for NSCAT and ERS scatterometers, the
data on the surface wind related to squares with sides of
are compared with the results of local measure-
ments of the wind from oceanographic buoys under the assumption that both the wind and the parameters of
waves participating in the formation of signals of the scatterometer are uniform within the limits of the indicated
squares (see, e.g., [1, 2]). The practical application of an SLR planned to be installed on the Sich-1M Ukrain-
ian–Russian satellite currently prepared for launching requires certain control and calibration. The procedure of
calibration can be made much simpler if we use the existing stationary oceanographic platform of the Experi-
mental Department of the Marine Hydrophysical Institute (Ukrainian Academy of Sciences) located in the coas-
tal zone of the Black Sea near Katsiveli (Crimea). It should be emphasized that the data given by the SLR are
not distorted by the appearance of land in the elements of resolution of the equipment for the zones located at a
distance of at least
from the coast.
At the same time, the platform is located at a distance of
the coast. Therefore, we are faced with a practically important question whether it is possible to use the data of
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
31–43, May–June, 2005. Original article submitted February 6, 2004;
revision submitted March 15, 2004.
0928-5105/05/1503–0161 © 2005 Springer Science+Business Media, Inc. 161