Topic
CHAYKA
About: CHAYKA is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 30 citations.
Papers
Patent•
30 Jan 1990
TL;DR: In this article, the authors proposed a radio navigation system with the aid of satellites, in which the radio navigation signal is generated on board the satellites by modulating the carrier frequency (fc) with an assemblage of signals including a pseudorandom sequence, the navigation data, and a synchronization code, and the object-users determine their positioning, speed of mation and a correction factor to the time scale during reception and processing of the radio signal.
Abstract: A method for radio navigation positioning with the aid of satellites, in accordance to which a radio navigation signal is generated on board the satellites (1) by modulating the carrier frequency (fc) with an assemblage of signals including a pseudorandom sequence, the navigation data, and a synchronization code, and the object-users (2) determine their positioning, speed of mation and a correction factor to the time scale during reception and processing of the radio navigation signal. According to the invention, each satellite or pair of mutual opposite satellites on an orbital plane are ascribed individual carrier frequencies (fcj, fck) and use a common to all satellites (1) pseudorandom M-sequence of truncated length, dibit coding of navigation data symbols and synchronization code of shortened repetition period and increased number of symbols. According to the invention, the radio navigation system completely implements this method on board each satellite (1) in the radio navigation signal generating and transmitting system and at each object-use (2) in the radio signal reception and processing subsystem. This improves the probability of navigation positioning at any instant of time with a high accuracy by practically completely eliminating the effects of intersystem interference and also substantially shortens the time of navigation positioning.
15 citations
1 Aug 2017
TL;DR: In this paper, the second frequency of the dual-frequency receiver is used to increase the accuracy of positioning by mitigating the influence of the ionosphere and other atmospheric effects on the signal.
Abstract: Traditionally the second frequency of the dual-frequency receiver is used to increase the accuracy of positioning by mitigating the influence of the ionosphere and other atmospheric effects on the signal. The presence of the useful signal at both frequencies is usually taken for granted, and it is indeed true for the Earth service zone, as the satellite antennas were primarily designed to ensure stable and reliable navigation in this zone. There is a certain difference in the radiation pattern between L1 and L2 frequencies. This plays an important role for satellite navigation in near-Earth space. The article provides the information about the use of the frequencies in the task of space navigation.
7 citations
TL;DR: Electronic navigation systems of all types are discussed, and classified as classical or self-contained, and the error rates and accuracies of the various systems are discussed.
Abstract: Electronic navigation systems of all types are discussed, and classified as classical or self-contained. The error rates and accuracies of the various systems are discussed.
5 citations
1 Jan 2019
TL;DR: Fundamental operating principle of MLAT is the usage of multilateral principle which is also used in the time-difference long-distance radio navigation systems such as LORAN-C and Chayka.
Abstract: Multilateration systems (MLAT) are designed for determining the coordinates of moving objects such as aircrafts or airfield’s facilities, equipped with aids of impulse radio signals’ emission. Fundamental operating principle of MLAT is the usage of multilateral principle which is also used in the time-difference long-distance radio navigation systems such as LORAN-C and Chayka. This principle is described in Sect. 1.7.
2 citations
1 Jan 1973
TL;DR: In this paper, the choice of frequency for radio navigation is a subject of considerable depth and is inextricably intertwined with requirements for range, accuracy, reliability, cost and impact on competitive services using radiowaves.
Abstract: The choice of frequency for radio navigation is a subject of considerable depth and is inextricably intertwined with requirements for range, accuracy, reliability, cost and impact on competitive services using radiowaves. The basic information for passing judgment on these items comprises the limitations imposed by nature on the system. These limitations are the laws of physics governing the propagation of radio waves. Great ranges and hence large coverage areas can be obtained at opposite ends of the spectrum in the OMEGA and SATELLITE systems. Great accuracy is accomplished with the ground wave propagation mechanism in the form of LORAN-C and LORAN-D. The choice of modulation is critical if high accuracy of position is an objective or requirement. It is concluded that the most important single subject bearing upon the choice of frequency concerns the propagation of the radio waves that the navigation systems utilize. The frequency ranges and other characteristics of present and proposed navigation systems are tabulated. Radio spectrum utilization is also considered.
2 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2017 | 1 |
| 1998 | 1 |
| 1990 | 1 |
| 1973 | 1 |
| 1959 | 1 |