过分爱国主义
发表于 2025-3-21 18:11:34
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Resign
发表于 2025-3-21 22:05:55
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遣返回国
发表于 2025-3-22 03:07:23
Certification Study Companion Series modulation technique and the energy-per-bit-to-noise-spectral-density ratio. Whereas the latter factor is a well-defined quantity, the former can be defined in many ways . Regardless of the definition, however, the required transmission bandwidth is directly related to the . (PSD) of the signa
bleach
发表于 2025-3-22 08:29:09
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CONE
发表于 2025-3-22 10:47:22
Quality Design for New Product Introductionview of the Multimission Command (MMC) System. The major components within the MMC System are discussed, with the emphasis on the telecommunication-related implementations. Two versions of the spacecraft command detection system — the Viking heritage command detector and the NASA standard command de
玩忽职守
发表于 2025-3-22 16:43:10
Engineering Sampling Standards and Planstry. It is the radio and the signal processing equipment residing in the spacecraft that interfaces with the Control & Data Subsystem and performs two-way communications with the earth-based Deep Space Network. The RFS consists of all the elements for RF reception, demodulation, modulation, and tran
玩忽职守
发表于 2025-3-22 19:21:53
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OTHER
发表于 2025-3-22 22:34:23
https://doi.org/10.1007/978-3-030-68402-0iption of weather effects. The measured effects of weather, namely atmospheric attenuation and increase in ground receiver system noise temperature, are additive (in decibels). The combined probability density function is therefore the convolution of the separate density functions.
ALERT
发表于 2025-3-23 03:57:06
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遗弃
发表于 2025-3-23 08:57:50
https://doi.org/10.1007/978-1-4020-8383-9freedom from interference. Radio frequencies for deep-space research may be chosen from bands that are allocated for that purpose. The choice of particular frequencies within those bands is guided mostly by the need to avoid interference between deep-space missions. Interference may also result from