Transceiver design for high altitude pseudo satellite aided dual satellite systems

2021 ◽  
Vol 179 ◽  
pp. 251-259
Author(s):  
Rajendra Prasad Sirigina ◽  
Madhukumar AS ◽  
Mark Bowyer
Keyword(s):  
High Altitude ◽  
Satellite Systems ◽  
Transceiver Design

scholarly journals ER-2 High Altitude Reconnaissance: A Case Study

1990 ◽  
Vol 66 (5) ◽  
pp. 480-486 ◽  
Author(s):  
W. Moore ◽  
T. Polzin
Keyword(s):  
Information System ◽  
Natural Resources ◽  
High Altitude ◽  
National Park ◽  
Effective Means ◽  
Data Entry ◽  
Cost Effective ◽  
Earth Satellite ◽  
Satellite Systems

There is an increasing requirement for a cost-effective means of updating digital base map and natural resources information systems. The Northern Forestry Centre of Forestry Canada is cooperating with Alberta Forestry, Lands and Wildlife and United States agencies to evaluate ER-2 high altitude (i.e., about 20 km) reconnaissance in Alberta. A demonstration flight was arranged on 20 July 1988 to cover flight lines from Waterton Lakes National Park to Lesser Slave Lake, and return (i.e., about 1500 km). The ER-2 platform provides both the high altitude perspective of earth satellite systems and the flexibilities of aircraft. The demonstration flight carried a panoramic camera, two mapping cameras and a digital scanner that were operated simultaneously. This provided rapid, high resolution and stereoscopic coverage of large areas. The savings from improved efficiencies for base map revisions alone, using one mapping camera were greater than the costs of routine ER-2 operations over Alberta. The three other selectable sensors would also permit natural resources information system updates for only the costs of processing, interpretation and data entry. These high altitude capabilities are required for forestry in Canada.

scholarly journals Integration of satellite system and Stratospheric Communication Platforms (SCP) for weather observation

2016 ◽  
Author(s):  
◽  
Sihle S. Sibiya
Keyword(s):  
High Altitude ◽  
Communication Systems ◽  
Satellite Communication ◽  
Meteorological Data ◽  
Cost Effective ◽  
Satellite System ◽  
Satellite Systems ◽  
Observation Area ◽  
Solar Powered ◽  
Weather Observation

This doctoral research introduces an integration of satellite systems and new stratospheric platforms for weather observation, imaging and transfer of meteorological data to the ground infrastructures. Terrestrial configuration and satellite communication subsystems represent well-established technologies that have been involved in global satellite sensing and weather observation area for years. However, in recent times, a new alternative has emerged based on quasi-stationary aerial platforms located in the Stratosphere called High Altitude Platform (HAP) or Stratospheric Communication Platforms (SCP). The SCP systems seem to represent a dream come true for communication engineers since they preserve most of the advantages of both terrestrial and satellite communication systems. Today, SCP systems are able to help, in a more cost effective way, developments of space Earth sensing and weather observation and weather sensing and observation. This new system can provide a number of forms ranging from a low altitude tethered balloon to a high altitude (18 – 25 km) fuel-powered piloted aircraft, solar-powered unmanned airplanes and solar-powered airship.

Support infrastructures based on high altitude platforms for navigation satellite systems

2005 ◽  
Vol 12 (5) ◽  
pp. 106-112 ◽  
Author(s):  
F. Dovis ◽  
L. Lo Presti ◽  
P. Mulassano
Keyword(s):  
High Altitude ◽  
Navigation Satellite ◽  
Satellite Systems ◽  
High Altitude Platforms

Contrast of Filament Bright Rims

1994 ◽  
Vol 144 ◽  
pp. 365-367
Author(s):  
E. V. Kononovich ◽  
O. B. Smirnova ◽  
P. Heinzel ◽  
P. Kotrč
Keyword(s):  
High Altitude ◽  
Line Profile ◽  
Line Center ◽  
Magnetic Structures ◽  
The Mean

AbstractThe Hα filtergrams obtained at Tjan-Shan High Altitude Observatory near Alma-Ata (Moscow University Station) were measured in order to specify the bright rims contrast at different points along the line profile (0.0; ± 0.25; ± 0.5; ± 0.75 and ± 1.0 Å). The mean contrast value in the line center is about 25 percent. The bright rims interpretation as the bases of magnetic structures supporting the filaments is suggested.

Clean Electron Microscope Substrate Films Used for Micrometeorite Collection and Study

1967 ◽  
Vol 25 ◽  
pp. 366-367
Author(s):  
D. M. Davies ◽  
R. Kemner ◽  
E. F. Fullam
Keyword(s):  
Thin Film ◽  
Electron Microscope ◽  
High Altitude ◽  
Amyl Acetate ◽  
Temperature Variations ◽  
Film Forming ◽  
Film Specimen ◽  
Particulate Contaminants

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.

New Drugs Scale High-Altitude Pulmonary Edema

2005 ◽  
Vol 38 (19) ◽  
pp. 14
Author(s):  
BRUCE JANCIN
Keyword(s):  
Pulmonary Edema ◽  
High Altitude ◽  
New Drugs ◽  
High Altitude Pulmonary Edema

Dynamic electrocardiography at high altitude

1966 ◽  
Vol 118 (2) ◽  
pp. 132-138 ◽  
Author(s):  
J. S. Sanders
Keyword(s):  
High Altitude

Development of techniques for the evaluation of high altitude pressure suits.

1959 ◽  
Author(s):  
Renato Contini ◽  
Rudolfs Drillis ◽  
Lawrence Slote
Keyword(s):  
High Altitude
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