A CONTINUOUSLY RECORDING AUTOMATIC AURORAL RADAR

1958 ◽  
Vol 36 (1) ◽  
pp. 1-8 ◽  
Author(s):  
A. G. McNamara

A simple, low-power 50 Mc./s. radar is described which has been designed for automatic recording of radio reflections from auroral ionization. The system features high sensitivity with good reliability. Photographic records are taken in the form of a continuous film strip displaying range and time. A complementary recording system employs circuitry which cancels interference and noise signals but produces an output signal proportional to the integrated echo intensity. The display in this latter case is in the form of a chart record from which data are immediately available.

2012 ◽  
Vol 29 (8) ◽  
pp. 088501 ◽  
Author(s):  
Zhao-Hua Zhang ◽  
Tian-Ling Ren ◽  
Yan-Hong Zhang ◽  
Rui-Rui Han ◽  
Li-Tian Liu

Author(s):  
Mariem Kanoun ◽  
David Cordeau ◽  
Jean-Marie Paillotl ◽  
Hassene Mnif ◽  
Mourad Loulou

2016 ◽  
pp. 21-46 ◽  
Author(s):  
Bahram Nabet ◽  
Pouya Dianat ◽  
Xia Zhao ◽  
Amro Anwar Seddik ◽  
Francisco Castro ◽  
...  

Sensors ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 188 ◽  
Author(s):  
Debo Wei ◽  
Jianyu Fu ◽  
Ruiwen Liu ◽  
Ying Hou ◽  
Chao Liu ◽  
...  

Micro-Pirani vacuum sensors usually operate at hundreds of microwatts, which limits their application in battery-powered sensor systems. This paper reports a diode-based, low power consumption micro-Pirani vacuum sensor that has high sensitivity. Optimizations to the micro-Pirani vacuum sensor were made regarding two aspects. On the one hand, a greater temperature coefficient was obtained without increasing power consumption by taking advantage of series diodes; on the other hand, the sensor structure and geometries were redesigned to enlarge temperature variation. After that, the sensor was fabricated and tested. Test results indicated that the dynamic vacuum pressure range of the sensor was from 10−1 to 104 Pa when the forward bias current was as low as 10 μA with a power consumption of 50 μW. Average sensitivity was up to 90 μV/Pa and the sensitivity of unit power consumption increased to 1.8 V/W/Pa. In addition, the sensor could also work at a greater forward bias current for better sensor performance.


2019 ◽  
Vol 85 ◽  
pp. 129-134
Author(s):  
François Gaugaz ◽  
François Krummenacher ◽  
Fabienne Gaugaz ◽  
Maher Kayal ◽  
Sylvain Joly ◽  
...  

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