сунъий йўлдошли глобал навигация тизимлари

PPTX 4,9 МБ Бесплатная загрузка

Предварительный просмотр (5 стр.)

Прокрутите вниз 👇

1538913318_67704.pptx layers of the earth’s atmosphere gps error budget gps error budget 30.0105vertical accuracy (95%) 22.580horizontal accuracy (95%) 7.526.0uere 0.50.5receiver noise 3.03.0multipath 3.03.0tropospheric delay 2.025.0ionospheric delayuser3 1.01.0others 4.54.5ephemeris errorcontrol2 1.01.0others selective availability satellite clock stability 0.00.0 3.03.0space 1 p codec/a code (1 σerror in m)error sourcesr. no. /docprops/thumbnail.jpeg слайд 1 сунъий йўлдошли глобал навигация тизимлари режа: кириш позициялаш тизими тарихи gps тизими бошқа тизимлар: glonass, galileo амалда тадбиқ этилиш соҳалари a-gps хулоса cssteap - 2012 2 10/7/2018 2 what is navigation where am i ? what is the time now ? how many variables do i need? 4 variables time (1) position(3) cssteap - 2012 3 навигация турлари тахминий хисоб ва хотира асосида (кўр-кўрона) бошқарув остида (гид ёрдамида) ер сиртидаги радио-позициялаш сунъий йўлдошлар ёрдамида. stone age to satellite age determination of position has evolved through ages stone age: use of stones, trees and mountains as points of reference. star age: …

авигация сунъий йўлдош тизими gps – global navigation system gnss – global navigation satellite system glonass – глобальная навигационная спутниковая система galileo – европа compass – beidou (хитой) qzss – япония launch of sputnik in 1957, the soviets successfully launched sputnik into space. it was the size of a basketball and weighed about 180 pounds. the soviets’ success embarrassed the united states who thought they were the world’s most advanced industrial nation. as a result of their humiliation, the country took an active role into researching military precision. the department of defenses primary purposes in developing a global position system was to use it in precision weapon delivery cssteap - 2012 16 spotting the sputnik doppler effect studying the doppler shift of the sputnik showed a variance of the sputnik signal in comparison of its position. as sputnik approached, the signal frequency was higher than the transmitted frequency. the frequency …

iver calculates doppler effects and satellite path to find its position one satellite is enough to calculate position accuracy is 100m for single frequency, 25m for dual frequency position could be calculated in two dimension (latitude, longitude) it took the submarines six to ten minutes to get a fix cssteap - 2012 20 transit pros and cons cons large gaps in coverage unavailable coverage measuring up to several hours to compensate, users had to interpolate (to estimate a value of a function between two known values) their positions between passes. users had to compensate for their velocity weather conditions could disrupt signal the process was slow and required long observation time provided two-dimensional positioning transit was not efficient for fast moving users. corrections had to be made for their velocity. e.g. aircrafts, missiles, etc. being developed by the military cssteap - 2012 21 transit pros and cons pros proof that …

time-transfer, and two-dimensional navigation. 1967- first timation satellite launched. timation clock development timation 1, developed by nrl, was a miniaturized, innovative design the quartz clock was less stable than expected, apparently due to temperature and cosmic-ray effects two significant problems during their testing: solar radiation caused shifts in the clock’s frequency, and ionospheric group delay created ranging errors. cssteap - 2012 25 project 621 b third forerunner of gps around the same time the us navy was developing timation, the us air force worked with a design concept using a similar technology program called project 621b. by 1972, the system demonstrated the operation of new type of satellite ranging signal based on pseudorandom noise (prn) biggest improvement- 3 dimensional navigation with continuous service!!! (latitude, longitude, and altitude) cssteap - 2012 26 navstar/gps introduction 1968-joint program office (jpo) department of defense steps in creates a joint tri-service committee called the navseg …

ellation how does gps work? 33 34 satellite based navigation receiving signals from 4 satellites to calculate position gps space segment 35 gps satellite constellation: 24 gps satellites in meo (medium earth orbit) satellites in 6 orbital planes, 4 satellites per orbital plane satellites at a height of of 20200 km above the surface of the earth orbital planes inclined at 55o with respect to the equatorial plane orbital period is about 11 hours 58 minutes essc 541-542 lecture 4.14.05 36 control segment master control station monitor station ground antenna colorado springs hawaii ascension islands diego garcia kwajalein monitor and control 36 the second segment we'll talk about is the operational control segment. this segment consists of 5 monitor stations on islands near the equator (hawaii, ascension, diego garcia, and kwajelin) and one master control station located at falcon afb, co. all of these stations track the gps signals, and …

Хотите читать дальше?

Скачайте полный файл бесплатно через Telegram.

Скачать полный файл

О "сунъий йўлдошли глобал навигация тизимлари"

1538913318_67704.pptx layers of the earth’s atmosphere gps error budget gps error budget 30.0105vertical accuracy (95%) 22.580horizontal accuracy (95%) 7.526.0uere 0.50.5receiver noise 3.03.0multipath 3.03.0tropospheric delay 2.025.0ionospheric delayuser3 1.01.0others 4.54.5ephemeris errorcontrol2 1.01.0others selective availability satellite clock stability 0.00.0 3.03.0space 1 p codec/a code (1 σerror in m)error sourcesr. no. /docprops/thumbnail.jpeg слайд 1 сунъий йўлдошли глобал навигация тизимлари режа: кириш позициялаш тизими тарихи gps тизими бошқа тизимлар: glonass, galileo амалда тадбиқ этилиш соҳалари a-gps хулоса cssteap - 2012 2 10/7/2018 2 what is navigation where am i ? what is the time now ? how many variables do i need? 4 variables time (1) position(3) cssteap - 2012 3 нави...

Формат PPTX, 4,9 МБ. Чтобы скачать "сунъий йўлдошли глобал навигация тизимлари", нажмите кнопку Telegram слева.

Теги: сунъий йўлдошли глобал навигаци… PPTX Бесплатная загрузка Telegram