Investigation of multipactor breakdown in communication satellite microwave co-axial systems

AbstractWintertime (April–September) area estimates of the Terra Nova Bay polynya (TNBP), Antarctica, based on satellite microwave radiometry are compared with in situ observations of water salinity, temperature and currents at a mooring in Terra Nova Bay in 1996 and 1997. In 1996, polynya area anomalies and associated anomalies in polynya ice production are significantly correlated with salinity anomalies at the mooring. Salinity anomalies lag area and/or ice production anomalies by about 3 days. Up to 50% of the variability in the salinity at the mooring position can be explained by area and/or ice production anomalies in the TNBP for April–September 1996. This value increases to about 70% when considering shorter periods like April–June or May–July, but reduces to 30% later, for example July–September, together with a slight increase in time lag. In 1997, correlations are smaller, less significant and occur at a different time lag. Analysis of ocean currents at the mooring suggests that in 1996 conditions were more favourable than in 1997 for observing the impact of descending plumes of salt-enriched water formed in the polynya during ice formation on the water masses at the mooring depth.

Download Full-text

A warm core in a polar low observed with a satellite microwave sounding unit

Tellus A Dynamic Meteorology and Oceanography ◽

10.1034/j.1600-0870.1996.t01-1-00001.x ◽

1996 ◽

Vol 48 (2) ◽

pp. 193-208 ◽

Cited By ~ 3

Author(s):

JOHN M. FORSYTHE ◽

THOMAS H. VONDER HAAR

Keyword(s):

Warm Core ◽

Microwave Sounding Unit ◽

Polar Low ◽

Microwave Sounding ◽

Satellite Microwave

Download Full-text

Identification of snow cover regimes through spatial and temporal clustering of satellite microwave brightness temperatures

Remote Sensing of Environment ◽

10.1016/j.rse.2009.09.002 ◽

2010 ◽

Vol 114 (1) ◽

pp. 199-210 ◽

Cited By ~ 18

Author(s):

C.J.Q. Farmer ◽

T.A. Nelson ◽

M.A. Wulder ◽

C. Derksen

Keyword(s):

Snow Cover ◽

Temporal Clustering ◽

Brightness Temperatures ◽

Satellite Microwave

Download Full-text

INFLUENCE OF REGULARITY OF SATELLITE MICROWAVE RADIOMETER MEASUREMENTS ON THE ACCURACY OF BRIGHTNESS TEMPERATURE REPRODUCTION IN AREAS OF THE TROPICAL CYCLONES

Meteorologiya i Gidrologiya ◽

10.52002/0130-2906-2021-4-78-85 ◽

2021 ◽

pp. 78-85

Author(s):

А. G. Grankov ◽

◽

А. А. Milshin ◽

Keyword(s):

Brightness Temperature ◽

Tropical Cyclones ◽

Microwave Radiometer ◽

Measurement Data ◽

Hurricane Wilma ◽

Brightness Temperatures ◽

Atmosphere System ◽

Ocean Atmosphere ◽

The Caribbean ◽

Satellite Microwave

An accuracy of reproduction of daily variations in the ocean–atmosphere system brightness temperature in the areas of development and movement of tropical hurricanes in the Caribbean Sea and Gulf of Mexico is analyzed. The analysis is based on the data of single and group satellite microwave radiometer measurements. The results are obtained using archival measurement data of SSM/I radiometers from the F11, F13, F14, and F15 DMSP satellites during the period of existence of tropical hurricanes Bret and Wilma. An example is given to demonstrate the use of daily brightness temperatures obtained from DMSP satellites for monitoring the development and propagation of hurricane Wilma.

Download Full-text

Theoretical study of ice cover phenology at large freshwater lakes based on SMOS MIRAS data

The Cryosphere ◽

10.5194/tc-12-2727-2018 ◽

2018 ◽

Vol 12 (8) ◽

pp. 2727-2740 ◽

Cited By ~ 1

Author(s):

Vasiliy Tikhonov ◽

Ilya Khvostov ◽

Andrey Romanov ◽

Evgeniy Sharkov

Keyword(s):

Brightness Temperature ◽

Open Water ◽

Ice Cover ◽

Freshwater Lakes ◽

Ice Melt ◽

Bear Lake ◽

Ocean Salinity ◽

Satellite Microwave ◽

Transportation Routes ◽

Temperature Time

Abstract. The paper presents a theoretical analysis of seasonal brightness temperature variations at a number of large freshwater lakes: Baikal, Ladoga, Great Bear Lake (GBL), Great Slave Lake (GSL), and Huron, retrieved from Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) data (1.4 GHz) of the Soil Moisture and Ocean Salinity (SMOS) satellite. The analysis was performed using the model of microwave radiation of plane layered heterogeneous nonisothermal medium. The input parameters for the model were real regional climatological characteristics and glaciological parameters of ice cover of the study lakes. Three distinct seasonal brightness temperature time regions corresponding to different phenological phases of the lake surfaces: complete ice cover, ice melt and deterioration, and open water were revealed. The paper demonstrates the possibility to determine the beginning of ice cover deterioration from satellite microwave radiometry data. The obtained results can be useful for setting the operating terms of winter crossings and roads on ice, as with the beginning of ice deterioration, these transportation routes across water bodies (rivers, lakes, water reservoirs) become insecure and cannot be used any more.

Download Full-text