Drones as Cyber-Physical Systems by Jung-Sup Um

Author:Jung-Sup Um
Language: eng
Format: epub
ISBN: 9789811337413
Publisher: Springer Singapore

Satellite

Launched

Decommissioned

Landsat 1

1972

1978

Landsat 2

1975

1983

Landsat 3

1978

1983

Landsat 4

1982

1993

Landsat 5

1984

2013

Landsat 6

1993

*

Landsat 7

1999

**

Landsat 8

2013

**

Landsat 9

2020

***

*Never achieved orbit, ** Operational, *** Anticipated launch

There are more than 400 operational earth observation satellites in orbit. Noticeable shift is recently observed from typical government-funded platforms towards micro-satellites that are industry-funded. Advances in small satellite technology have cut the cost of investing in a specific satellite space segment. These platforms often utilise off-the-shelf components that cost a fraction of the traditional satellites. This trend will lead to the availability of cheap and abundant satellite imagery over the next few years [25]. The fleet of satellites operated by private companies is rapidly expanding. CubeSats called nanosatellites are built to standard dimensions of 10 cm × 10 cm × 10 cm (weigh 1.3 kg) and use smartphone components. STRaND-1 was the first smartphone satellite to go into orbit, built by Surrey Satellite Technology (part of the Airbus group) out of a Google Nexus One smartphone and a 3-unit CubeSat [26].

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