scholarly journals Detection of an Ice-Forming Area by Radar and Satellite

1985 ◽  
Vol 6 ◽  
pp. 252-253 ◽  
Author(s):  
Masaaki Aota ◽  
Masayuki Oi ◽  
Masao Ishikawa ◽  
Hiroki Fukushi
Keyword(s):  
Sea Ice ◽  
Surface Temperature ◽  
Satellite Data ◽  
Okhotsk Sea ◽  
Sea Clutter ◽  
Thermal Images ◽  
Radar Echoes ◽  
Pack Ice ◽  
Sea Coast ◽  
Infrared Radiometer

This paper describes a method of distinguishing between pack ice and sea clutter in radar echoes, an attempt to roughly estimate the thickness of sea ice from measurement of surface temperature by air-borne infrared radiometer, and an application of thermal images from satellite data to estimate the concentration of sea ice off the Okhotsk Sea coast of Hokkaido.

scholarly journals Detection of an Ice-Forming Area by Radar and Satellite

1985 ◽  
Vol 6 ◽  
pp. 252-253
Author(s):  
Masaaki Aota ◽  
Masayuki Oi ◽  
Masao Ishikawa ◽  
Hiroki Fukushi
Keyword(s):  
Sea Ice ◽  
Surface Temperature ◽  
Satellite Data ◽  
Okhotsk Sea ◽  
Sea Clutter ◽  
Thermal Images ◽  
Radar Echoes ◽  
Pack Ice ◽  
Sea Coast ◽  
Infrared Radiometer

This paper describes a method of distinguishing between pack ice and sea clutter in radar echoes, an attempt to roughly estimate the thickness of sea ice from measurement of surface temperature by air-borne infrared radiometer, and an application of thermal images from satellite data to estimate the concentration of sea ice off the Okhotsk Sea coast of Hokkaido.

scholarly journals Movements of Marginal Pack Ice Off the Okhotsk Sea Coast of Hokkaido

1985 ◽  
Vol 6 ◽  
pp. 192-194
Author(s):  
Nobuo Ono
Keyword(s):  
Sea Ice ◽  
Okhotsk Sea ◽  
Radar Network ◽  
Pack Ice ◽  
Wide Range ◽  
Ice Field ◽  
Ice Floes ◽  
Image Position ◽  
Ice Radar ◽  
Sea Coast

Movement of pack ice off the Okhotsk Sea coast of Hokkaido was investigated using combinations of sea ice radar photographs and Landsat MSS imageries. The sea ice radar network, consisting of three C-band (5.54 GHz) radar stations, covers an area of about 60 km across and 250 km along the coast. As radar echoes display not the shape of ice floes but the roughness of the ice field, the shapes of floes were drawn on a radar photograph overlaid upon a simultaneous Landsat Fig. 1.The coverage of the sea ice radar network. imagery. Each floe was then traced on the sequential photographs of radar display. The path of each floe frequently indicated a trochoidal oscillation of 18-hour period which is close to the inertial period of this area-Such paths were examined as representing the motion of inertial circle transported upon a long-period movement. The parameter v/U indicates the magnitude of meandering movement of an ice floe within the inertial period, where v is the circumferential velocity of inertial circle motion and U is the average velocity of a main drift in the inertial period. Values of v/U were obtained in a wide range from 0.4 to 8.3 for 18-hour trochoidal paths sampled.

scholarly journals Movements of Marginal Pack Ice Off the Okhotsk Sea Coast of Hokkaido

1985 ◽  
Vol 6 ◽  
pp. 192-194
Author(s):  
Nobuo Ono
Keyword(s):  
Sea Ice ◽  
Okhotsk Sea ◽  
Radar Network ◽  
Pack Ice ◽  
Wide Range ◽  
Ice Field ◽  
Ice Floes ◽  
Image Position ◽  
Ice Radar ◽  
Sea Coast

Movement of pack ice off the Okhotsk Sea coast of Hokkaido was investigated using combinations of sea ice radar photographs and Landsat MSS imageries. The sea ice radar network, consisting of three C-band (5.54 GHz) radar stations, covers an area of about 60 km across and 250 km along the coast. As radar echoes display not the shape of ice floes but the roughness of the ice field, the shapes of floes were drawn on a radar photograph overlaid upon a simultaneous Landsat Fig. 1. The coverage of the sea ice radar network. imagery. Each floe was then traced on the sequential photographs of radar display. The path of each floe frequently indicated a trochoidal oscillation of 18-hour period which is close to the inertial period of this area-Such paths were examined as representing the motion of inertial circle transported upon a long-period movement. The parameter v/U indicates the magnitude of meandering movement of an ice floe within the inertial period, where v is the circumferential velocity of inertial circle motion and U is the average velocity of a main drift in the inertial period. Values of v/U were obtained in a wide range from 0.4 to 8.3 for 18-hour trochoidal paths sampled.

scholarly journals Sea-ice Reconnaissance by Radar

1975 ◽  
Vol 15 (73) ◽  
pp. 215-224 ◽  
Author(s):  
Tadashi Tabata
Keyword(s):  
Sea Ice ◽  
Cross Correlation ◽  
Correlation Method ◽  
Radar Network ◽  
Radar Screen ◽  
Pack Ice ◽  
Ice Field ◽  
Internal Deformation ◽  
Radar Information ◽  
Sea Coast

AbstractTo observe the distribution of pack ice off the coast of the Okhotsk Sea coast of Hokkaido, a radar network consisting of three radar stations was constructed during 1967-69. It covers an area about 70 km wide and 250 km long. The stations are remote-controlled by radio from the Sea Ice Research Laboratory and the information obtained is transmitted back to the laboratory and observed there. Radar has the great advantage of being able to make continuous observations of ice. Usually several special features can be seen on the radar screen, and they are used as markers for the observation of movement. It is ascertained that the average pattern of drift in this area is from north to south-east along the coast line and the ice field undergoes internal deformation during its drift. To get some information on the surface topography of ice from A-scope radar, the intensity of echo signals is classified into 16 steps by computer. To obtain the movement of an ice field from the numerical radar information, a modified two-dimensional cross-correlation method was tested.

scholarly journals Monitoring of Surface Temperature on Parco delle Biancane (Italian Geothermal Area) Using Optical Satellite Data, UAV and Field Campaigns

2020 ◽  
Vol 12 (12) ◽  
pp. 2018
Author(s):  
Malvina Silvestri ◽  
Enrica Marotta ◽  
Maria Fabrizia Buongiorno ◽  
Gala Avvisati ◽  
Pasquale Belviso ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Spatial Resolution ◽  
Satellite Data ◽  
Field Measurements ◽  
Geothermal Field ◽  
Landsat 8 ◽  
Ground Field ◽  
Thermal Images ◽  
Field Campaigns ◽  
Temperature Maps

The purpose of this study is to analyze the surface temperature and the distribution of thermal signatures on Tuscany’s geothermal districts using data obtained through three separate surveys via satellite and an unmanned aerial vehicle (UAV). The analysis considers the highest available spatial resolution ranging from hundreds of meters per pixel of the satellite thermal images and the tenths/hundreds of centimeters per pixel of the thermal images acquired by the UAV. The surface temperature maps obtained by satellite data acquired at suitable spatial resolution and the thermal measurements obtained by the thermal camera installed on the UAV were orthorectified and geocoded. This allowed, for example, following the evolution of thermal anomalies, which may represent a modification of the current state of the geothermal field and a possible hazard for both the population and industrial assets. Here, we show the results obtained in three field campaigns during which the simultaneous acquisition of Landsat 8 satellite and UAV (FlyBit octocopter, IDS, Rome, Italy) thermal data were analyzed. By removing the atmosphere contribution from Landsat 8 data, we have produced three surface temperature maps that are compared with the ground field measurements and the surface temperature maps elaborated by FLIR VUE PRO-R on the UAV.

scholarly journals A STUDY OF SEA ICE FLOE DISTRIBUTION ON OKHOTSK SEA COAST OF HOKKAIDO

2020 ◽  
Vol 76 (2) ◽  
pp. I_905-I_910
Author(s):  
Shinji KIOKA ◽  
Maiko ISHIDA ◽  
Tomoki HASEGAWA ◽  
Takahiro TAKEUCHI ◽  
Hiroshi SAEKI
Keyword(s):  
Sea Ice ◽  
Okhotsk Sea ◽  
Sea Coast

scholarly journals Sea-ice Reconnaissance by Radar

1975 ◽  
Vol 15 (73) ◽  
pp. 215-224 ◽  
Author(s):  
Tadashi Tabata
Keyword(s):  
Sea Ice ◽  
Cross Correlation ◽  
Correlation Method ◽  
Radar Network ◽  
Radar Screen ◽  
Pack Ice ◽  
Ice Field ◽  
Internal Deformation ◽  
Radar Information ◽  
Sea Coast

Abstract To observe the distribution of pack ice off the coast of the Okhotsk Sea coast of Hokkaido, a radar network consisting of three radar stations was constructed during 1967-69. It covers an area about 70 km wide and 250 km long. The stations are remote-controlled by radio from the Sea Ice Research Laboratory and the information obtained is transmitted back to the laboratory and observed there. Radar has the great advantage of being able to make continuous observations of ice. Usually several special features can be seen on the radar screen, and they are used as markers for the observation of movement. It is ascertained that the average pattern of drift in this area is from north to south-east along the coast line and the ice field undergoes internal deformation during its drift. To get some information on the surface topography of ice from A-scope radar, the intensity of echo signals is classified into 16 steps by computer. To obtain the movement of an ice field from the numerical radar information, a modified two-dimensional cross-correlation method was tested.

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