TSTI Admin No Comments April 10, 2026

geocentric

EarthSolar energyWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More reflected off EarthSolar energy reflected off Earth that accounts for about 20% of the total energy impacting low-Earth-orbiting spacecraft. More that accounts for about 20% of the total energyWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More impacting low-Earth-orbiting spacecraft. More centered. Aristotle’s belief that the other planets, moon, and sunWe use the angle of incidenceWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More, θ, to determine how much solarWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More energyWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More hits a solarWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More panelWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More. This angleWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More lies between a line perpendicular to the cell and […]

TSTI Admin No Comments October 7, 2024

geocentric-equatorial

This means at the Earth’s center and equatorThe nodeThe node where the spacecraft goes from below the equator (Southern Hemisphere) to above the equator (Northern Hemisphere). More where the spacecraft goes from below the equatorThe node where the spacecraft goes from below the equator (Southern Hemisphere) to above the equator (Northern Hemisphere). More (Southern Hemisphere) to above the equatorThe node where the spacecraft goes from below the equator (Southern Hemisphere) to above the equator (Northern Hemisphere). More (Northern Hemisphere). More. We use the GeocentricEarth centered. Aristotle’s belief that the other planets, moon, and sun orbited around the Earth dominated astronomyThe science of the heavens. Ancient Greeks considered this to be a divine practice best understood through physical theories. More for 2000 years. More equatorial coordinate systemA frame of […]

TSTI Admin No Comments April 10, 2026

geographic information system (GIS)

A space-based process to give detailed terrestrial information to users such as map makers, geographers, farmers, military planners, and many others who work on or with the land. With a global perspective, space cameras can image large areas in three dimensions to create relief maps filled with pertinent information.

TSTI Admin No Comments April 6, 2026

geostationary

This type of orbitThe oval-shaped pathThe elliptical-shaped path a satellite takes in going from one circular orbit to another as part of a Hohmann Transfer. More that a spacecraft follows. Orbits come in various shapes and sizes, but each one has a purpose: to let the spacecraft do its job. Higher orbitsThe study of the moving objects under the influence of gravity from another body. Astrodynamicists design orbits and study how gravity affects them. More require more propellant to get a spacecraft there. More is circular with a period of about 24 hours and an inclinationDescribes the tilt […]

TSTI Admin No Comments April 10, 2026

geosynchronous orbit

This type of orbit remains over the same pointThe job of the attitude determination and control subsystemThe job of the attitude determination and control subsystem (ADCS) is to keep its spacecraft pointed in the right direction. More (ADCS) is to keep its spacecraft pointed in the right direction. More on the equatorThe node where the spacecraft goes from below the equatorThe node where the spacecraft goes from below the equator (Southern Hemisphere) to above the equator (Northern Hemisphere). More (Southern Hemisphere) to above the equatorThe node where the spacecraft goes from below the equator (Southern Hemisphere) to above the equator (Northern Hemisphere). More (Northern Hemisphere). More all the timeThe time between successive passages of the Sun overhead, which is from noon one day to noon the next day. Because Earth’s orbit around the Sun is slightly elliptical, this time varies slightly during a year. More. It is […]

TSTI Admin No Comments April 10, 2026

Global Positioning System (GPS)

The U.S. constellationA collection of cooperating spacecraft. When mission coverage or timing requires nearly continual signal collection and transmission, we use more than one spacecraft and have them help each other. The Global Positioning System and Iridium communicationAn assembly of spacecraft components that collect, process, store, and transmit payload-mission and bus-housekeeping data. The communication and data-handling subsystem (CDHS) acts as the ears, brain, and mouth of the spacecraft • It has two primary portions — communication and data handling • It translates raw data from the payloads and subsystems into useful information and sends it to the ground system • Commands from ground controllers generally request information from and give specific instructions to individual subsystems More constellations are good examples. More of satellites that transmit navigation data to usersThe people who will benefit from the mission. Also see customers. This is one of the three concepts included in the mission statement. More on EarthSolar energy reflected off Earth that accounts for about 20% of the total energy impacting low-Earth-orbiting spacecraft. More. This process […]

TSTI Admin No Comments April 10, 2026

global space industry

Worldwide commercial space activities that produce a business profit. The four main markets are space services, designing and manufacturing spacecraft, designing and manufacturing space-operations equipment, and launch services.

TSTI Admin No Comments April 10, 2026

globalization

Providing products and services to a worldwide market from space. As more countries get involved in space activities and use space products and services, the space industry grows in a big way.

TSTI Admin No Comments April 6, 2026

GNSS

GNSS stands for Global Navigation Satellite System, a general term for satellite constellations providing global, autonomousRefers to the ability of a spacecraft to perform some or all of its functions without human interventionRefers to the ability of a spacecraft to perform some or all of its functions without human intervention. More. More, geospatial positioning, navigation, and timing (PNT) services. Unlike just GPS (US), GNSSGNSS stands for Global Navigation Satellite System, a general term for satellite constellations providing global, autonomous, geospatial positioning, navigation, and timing (PNT) services. Unlike just GPS (US), GNSS includes multiple systems—GPS, GLONASS, Galileo, BeiDou—allowing receivers to use signals from various satellites for increased accuracy. The accuracy from these systems has revolutionized mapmaking and enabled easier navigation across oceans and remote terrain. More includes multiple systems—GPS, GLONASS, GalileoGalileo Galilei (1564-1642) developed a […]

TSTI Admin No Comments October 7, 2024

gravity

The tendency for two or more objects to attract each other. The more mass they have, the stronger the gravitational force.