
The paper deals with the problem of selecting an optimum frequency separation between the receiver channels of the frequency-scanning crossed interferometer. A dependence of the frequency separation boundaries on the hour angle and declination is obtained. The study is based on the generalized Kotelnikov two-dimensional theorem taking into account the scanning direction. A radio telescope beam is considered as a space-frequency filter. It is emphasized that the transformation of a two-dimensional signal requires a two-step procedure involving discrete sampling and element-by-element quantization.
Рассматривается вопрос о выборе оптимального частотного разноса между каналами приемного устройства крестообразного интерферометра с частотным сканированием. Получена зависимость границ частотного разноса от часового угла и склонения. Исследование проведено на основе обобщенной двухмерной теоремы Котельникова с учетом направления сканирования. Диаграмма направленности радиотелескопа рассматривается как фильтр пространственных частот. Стоит подчеркнуть, что при преобразовании двухмерного сигнала прибегаем к двухступенчатой процедуре: дискретизации и поэлементному квантованию.
РАДИОИНТЕРФЕРОМЕТР,ДВУХМЕРНЫЙ СИГНАЛ,TWO-DIMENSIONAL SIGNAL,ДИСКРЕТИЗАЦИЯ,МНОГОЧАСТОТНЫЙ ПРИЕМ,MULTIFREQUENCY RECEPTION,СЕТКА ОТСЧЕТОВ,СЕТКА ФИКСИРОВАННЫХ ЧАСТОТ,FIXED FREQUENCY GRID,RADIOINTERFEROMETER,DISCRETE SAMPLING,REFERENCE GRID
РАДИОИНТЕРФЕРОМЕТР,ДВУХМЕРНЫЙ СИГНАЛ,TWO-DIMENSIONAL SIGNAL,ДИСКРЕТИЗАЦИЯ,МНОГОЧАСТОТНЫЙ ПРИЕМ,MULTIFREQUENCY RECEPTION,СЕТКА ОТСЧЕТОВ,СЕТКА ФИКСИРОВАННЫХ ЧАСТОТ,FIXED FREQUENCY GRID,RADIOINTERFEROMETER,DISCRETE SAMPLING,REFERENCE GRID
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 0 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
