scholarly journals Spi-OPS: Spitzer and CHEOPS confirm the near-polar orbit of MASCARA-1 b and reveal a hint of dayside reflection

2021 ◽  
Author(s):  
M. J. Hooton ◽  
S. Hoyer ◽  
D. Kitzmann ◽  
B. M. Morris ◽  
A. M. S. Smith ◽  
...  
Keyword(s):  
Polar Orbit

Rollback Links Characterization for the Snapshot Routing Algorithm in Polar-Orbit Satellite Networks

2015 ◽  
Vol E98.B (8) ◽  
pp. 1715-1724 ◽  
Author(s):  
Zhu TANG ◽  
Chunqing WU ◽  
Zhenqian FENG ◽  
Wanrong YU ◽  
Baokang ZHAO ◽  
...  
Keyword(s):  
Routing Algorithm ◽  
Satellite Networks ◽  
Polar Orbit ◽  
Orbit Satellite

A cosmic antimatter detector on a polar-orbit satellite

1989 ◽  
Vol 103 (6) ◽  
pp. 635-646
Author(s):  
G. Basini ◽  
P. Spillantini ◽  
M. Ricci ◽  
P. Picozza
Keyword(s):  
Polar Orbit ◽  
Orbit Satellite

Gyroscope on Polar Orbit in the Kerr Field

1997 ◽  
Vol 29 (2) ◽  
pp. 153-159 ◽  
Author(s):  
O. Semerák
Keyword(s):  
Polar Orbit ◽  
Kerr Field

Distributed MIMO System Design and Channel Capacity Analysis Based on Polar Orbit LEO Constellation

2021 ◽  
Vol 55 (6) ◽  
pp. 557-567
Author(s):  
Chi Zhang ◽  
Huan-yu Li ◽  
Hui Li ◽  
Zhi-yang Lin ◽  
Ping Wang
Keyword(s):  
System Design ◽  
Channel Capacity ◽  
Mimo System ◽  
Capacity Analysis ◽  
Polar Orbit

scholarly journals The Double Star mission

2005 ◽  
Vol 23 (8) ◽  
pp. 2707-2712 ◽  
Author(s):  
Z. X. Liu ◽  
C. P Escoubet ◽  
Z. Pu ◽  
H. Laakso ◽  
J. K. Shi ◽  
...  
Keyword(s):  
Space Science ◽  
Double Star ◽  
The Other ◽  
Polar Orbit ◽  
Equatorial Orbit ◽  
Ground Station ◽  
Ground Segment ◽  
The Earth ◽  
Science Operations

Abstract. The Double Star Programme (DSP) was first proposed by China in March, 1997 at the Fragrant Hill Workshop on Space Science, Beijing, organized by the Chinese Academy of Science. It is the first mission in collaboration between China and ESA. The mission is made of two spacecraft to investigate the magnetospheric global processes and their response to the interplanetary disturbances in conjunction with the Cluster mission. The first spacecraft, TC-1 (Tan Ce means "Explorer"), was launched on 29 December 2003, and the second one, TC-2, on 25 July 2004 on board two Chinese Long March 2C rockets. TC-1 was injected in an equatorial orbit of 570x79000 km altitude with a 28° inclination and TC-2 in a polar orbit of 560x38000 km altitude. The orbits have been designed to complement the Cluster mission by maximizing the time when both Cluster and Double Star are in the same scientific regions. The two missions allow simultaneous observations of the Earth magnetosphere from six points in space. To facilitate the comparison of data, half of the Double Star payload is made of spare or duplicates of the Cluster instruments; the other half is made of Chinese instruments. The science operations are coordinated by the Chinese DSP Scientific Operations Centre (DSOC) in Beijing and the European Payload Operations Service (EPOS) at RAL, UK. The spacecraft and ground segment operations are performed by the DSP Operations and Management Centre (DOMC) and DSOC in China, using three ground station, in Beijing, Shanghai and Villafranca.

scholarly journals Experiences with the GPS in Unstabilized CubeSat

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Pavel Kovar
Keyword(s):  
Experimental Data ◽  
Signal Acquisition ◽  
Gps Receiver ◽  
Small Satellite ◽  
Power Budget ◽  
Successful Operation ◽  
Polar Orbit ◽  
Position Information ◽  
Space Experiments ◽  
Satellite Rotation

The paper summarizes the experiences with the operation of the piNAV GPS receiver in a 1U unstabilized CubeSat operated on LEO orbit. piNAV L1 is a GPS receiver developed by an author for small satellite missions. The receiver is equipped with the 15 GPS L1 C/A channels and acquisition accelerator that shortens the cold start of the receiver on LEO to 65 s. The typical power consumption is 120 mW. Lucky-7 is a private 1U technological CubeSat with power budget 1 W that operates on the quasisynchronous polar orbit at altitude 520 km. One of its scientific missions is to test the operation of GPS. The space experiments proved the successful operation of the GPS receiver. The position information was available for approximately 80% of the time, where the position outage was caused by a satellite rotation and relatively long navigation signal reacquisition. The experimental data proved that the position availability can be improved by a higher-performance signal acquisition engine.

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