Satellites at work (Space in the seventies)

The use of satellites in the areas of communications, meteorology, geodesy, navigation, air traffic control, and earth resources technology is discussed. NASA contributions to various programs are reviewed

Saturn in-flight experimental payload study. Volume II - Design of in-flight experiments Technical report, Jul. 1965 - Feb. 1966

Computer program for evaluating space experiments for Saturn in-flight payloads - experiment desig

Алгоритм управления беспилотными летательными аппаратами в процессе визуального сопровождения объектов с изменяемой траекторией движения

The purpose of the research was to create an algorithm for determining and correcting the output parameters of the navigation module and the flight-navigation complex of unmanned aerial vehicles which provides control of an aviation gyro-stabilized platform with a multispectral optoelectronic system during flight and tracking various objects of observation.Principles of control of an aviation technical vision system located on an unmanned aerial vehicle on a two-degree gyro-stabilized platform with the possibility of full turn around two perpendicular axes along the course and pitch are considered. Stability of tracking of observation objects at a distance of up to 10000 m is ensured by the use of a multispectral optoelectronic system including a rangefinder, thermal imaging and two visual channels.Analysis of the object of observation and the method of its support are carried out. An algorithm is proposed for integrating a Global Navigation Satellite System and a strapdown inertial navigation system based on the extended Kalman filter which includes two stages of calculations, extrapolation (prediction) and correction. Specialized software in the FreeRTOS v9.0 environment has been developed to obtain a navigation solution: latitude, longitude and altitude of the unmanned aerial vehicle in the WGS-84 coordinate system, as well as the pitch, heading and roll angles; north, east and vertical components of velocities in the navigation coordinate system; longitudinal, vertical and transverse components of free accelerations and angular velocities in the associated coordinate system based on data from the receiving and measuring module of the Global Navigation Satellite System and data from the 6-axis MEMS sensor STIM300.Рассмотрены принципы управления авиационной системой технического зрения, размещённой на беспилотном летательном аппарате на двухстепенной гиростабилизированной платформе с возможностью полного разворота вокруг двух перпендикулярных осей по курсу и тангажу. Устойчивость сопровождения объектов наблюдения на расстоянии до 10000 м обеспечивается применением мультиспектральной оптико-электронной системы, включающей дальномерный, тепловизионный и два визуальных канала.Выполнен анализ объекта наблюдения и методика его сопровождения. Предложен алгоритм интеграции спутниковой радионавигационной системы и бесплатформенной инерциальной навигационной системы на основе интегрального фильтра Калмана, предусматривающей две стадии вычислений: экстраполяцию (предсказание) и коррекцию. В модуль навигации встроено специализированное программное обеспечение для многозадачной операционной системы реального времени FreeRTOS, обеспечивающее получение навигационного решения: широты, долготы и высоты беспилотного летательного аппарата в системе координат WGS-84, а также углов крена тангажа и курса; северной, восточной и вертикальной составляющих скоростей в навигационной системе координат; продольной, вертикальной и поперечной составляющих свободных ускорений и угловых скоростей в связанной системе координат на основе данных от приёмо-измерительного модуля спутниковой радионавигационной системы и данных от 6-осевого МЭМС-датчика STIM 300

Peaceful uses of earth-observation spacecraft. Volume I - Introduction and summary

Earth orbiting satellite observation for science and economic

Study of large adaptive arrays for space technology applications

The research in large adaptive antenna arrays for space technology applications is reported. Specifically two tasks were considered. The first was a system design study for accurate determination of the positions and the frequencies of sources radiating from the earth's surface that could be used for the rapid location of people or vehicles in distress. This system design study led to a nonrigid array about 8 km in size with means for locating the array element positions, receiving signals from the earth and determining the source locations and frequencies of the transmitting sources. It is concluded that this system design is feasible, and satisfies the desired objectives. The second task was an experiment to determine the largest earthbound array which could simulate a spaceborne experiment. It was determined that an 800 ft array would perform indistinguishably in both locations and it is estimated that one several times larger also would serve satisfactorily. In addition the power density spectrum of the phase difference fluctuations across a large array was measured. It was found that the spectrum falls off approximately as f to the minus 5/2 power

Data catalog series for space science and applications flight missions. Volume 4A: Descriptions of meteorological and terrestrial applications spacecraft and investigations

The National Space Science Data Center (NSSDC) provides data from and information about space science and applications flight investigations in support of additional studies beyond those performed as the principal part of any flight mission. The Earth-orbiting spacecraft for investigations of the earth and its atmosphere is discussed. Geodetic tracking data are included in this category. The principal subject areas presented are meteorology and earth resources survey, and the spacecraft selection is made according to those subjects. All experiments on board the spacecraft are described. No attempt is made to reference investigations that are related to the above disciplines, but that are described in other volumes of this series

Space station user's handbook

A user's handbook for the modular space station concept is presented. The document is designed to acquaint science personnel with the overall modular space station program, the general nature and capabilities of the station itself, some of the scientific opportunities presented by the station, the general policy governing its operation, and the relationship between the program and participants from the scientific community

Aerospace Medicine and Biology: A continuing bibliography with indexes, supplement 140

This bibliography lists 306 reports, articles, and other documents introduced into the NASA scientific and technical information system in March 1975