Lesson 1

SATELLITES

Satellites are objects that orbit other objects, usually in space.

Natural satellites

a natural body that orbits another body in space such as the boon

Artificial satellites

man made objects that have been places into orbit like the ISS

Launching satellites are extremely expensive and most countries launch their own satellites for a reason, mainly for the benefit of the population or an advantage over other countries

Video: https://www.youtube.com/watch?v=fft0IWOwx9s

Much planning is put into developing a durable and useful satellite

It can take up to years to build a satellite due to strict quality checks testing etc.

Satellites are transported from assemble areas to launch sites via special shipping containers how ever they are vulnerable to damages in the containers

Satellite Transportation Systems (STS) are extremely important as they protect the satellites against environmental hazard like temperature, humidity, contamination, rain, dust

they also protect the satellites from mechanical shock, vibrations, unwanted gases and radio frequency, radiation hazards

Gaseous nitrogen purging is done through the use of involving nitrogen gas to eliminate unwanted gases

Radio frequency radiation hazards are either [[[[[[[[[[[[[[[[[[[[[[[[[[[

Components of a satellite

PRIMARY

Antenna/transponder

send and receive radio signals to enable to exchange of information between the satellite and earth.

Power system

to power the satellites onboard electrical equipment

Propulsion system

important to get the satellite to orbit. thruster are fired occasionally to make adjustments in its orbital position

SECONDARY

Housing

satellites "shell". constructed from strong materials that can withstand the harsh space environment.

Command and Data handling

operational heart of a satellite command and control systems, monitors the satellite and receive commands from earth operation

CONTEMPORARY ISSUE #1: Space junk

Meaning: Anything left behind by human activities in space

Task: research 1 source and whether the source is accurate

source 1: a lot of space junk can come from space exploration

source 2: satellite and space stations take little to know damage to space junk. they can easily be maneuvered away with resistojet or monopropellant rockers

source 3: space junk are small and slow and cannot cause a crisis (Chosen)

128 million pieces of debris smaller than 1 cm (0.4 in), about 900,000 pieces of debris 1–10 cm, and around 34,000 of pieces larger than 10 cm. The main worry is that such debris will hit a space station, satellite or other equipment. Space junk move about 25,000 kilometers per hour.

At that speed, even a small piece of debris can cause enormous damage.

REFLECTION:

Im really tired and a little sad there wasnt a kahoot and that the video didnt play properly and that i have a geog assignment due at 6pm and its currently 4:30pm…… but the topic was pretty interesting. my only recommendation is to go slower cause my fingers hurt from typing so fast. also i missed out the defination of radiofrequency radiation hazard.