Zobrazeno 1 - 10
of 18
pro vyhledávání: '"H. W. Arnold"'
Publikováno v:
PIMRC
The PACS radio interface is the leading low-tier candidate for standardization in North America. This radio interface was originally conceived to serve pedestrian and fixed-distribution applications; there has been significant recent interest in exte
Publikováno v:
IEEE Journal on Selected Areas in Communications. 5:764-773
In our highly mobile society, the provision of voice and data communications to a person away from his/her wireline telephone has become a major communications frontier. The early penetration of this frontier has been based on very limited portable c
Publikováno v:
Radio Science. 13:511-517
Strong depolarization (sometimes > −20 dB) at 19 and 12 GHz occurring with low signal attenuation (often
Publikováno v:
Radio Science. 16:885-907
The amplitudes of satellite signals sometimes scintillate ± several decibels when heavy cumulus clouds pass through the radio path on hot summer days. These scintillations have been measured on a 19-GHz and 28-GHz earth-space path using 7-m and 0.6-
Publikováno v:
Radio Science. 15:855-865
One year of propagation data were obtained for a 19-GHz earth-satellite path terminating at Crawford Hill, New Jersey. These data were analyzed to determine the depolarizing and attenuating properties of liquid (rain) and solid (ice) hydrometeors alo
Autor:
H. W. Arnold
Publikováno v:
Albrecht von Graefe's Archive for Clinical and Experimental Ophthalmology. 216:77-84
Anhand von Ratten, die mit verschiedenen Corticosteroiden behandelt wurden, wurde deren Einflus auf die fibrinolytische Aktivitat verschiedener Gewebe des Auges untersucht. Es wurde dabei die Fibrinplattchenmethode nach Todd verwendet. Nach 14tagiger
Autor:
D. C. Cox, H. W. Arnold
Publikováno v:
Radio Science. 19:617-628
Rain and ice in a radio path can couple power from a wave transmitted with a given polarization into the orthogonal polarization. At any point along a path, the ratio of the cross-polarized signal component to the copolarized signal component is defi
Publikováno v:
Bell System Technical Journal. 57:1289-1329
This paper describes the receiving electronics built at the Bell Laboratories Crawford Hill facility at Holmdel, New Jersey to use the 19-and 28-GHz beacons on the COMSTAR satellites for propagation measurements. The receiving system accurately deter
Publikováno v:
Bell System Technical Journal. 57:1331-1339
This paper describes the antenna and receiving electronics for the Bell Laboratories Crawford Hill 19-GHz COMSTAR Interim Experiment. This experiment has collected essentially continuous 19-GHz attenuation data on the earth-space path to the COMSTAR
Autor:
H. W. Arnold, J. M. Titus
Publikováno v:
Bell System Technical Journal. 61:1567-1572
Little information exists on earth-space propagation at lower elevation angles. One earlier experiment1 has shown greater fluctuation in signal levels over low-elevation paths. This signal fluctuation likely results from focusing and defocusing by in