The RADARSAT constellation is a pair of Canadian Remote Sensing satellites. The constellation consists of:

RADARSAT International (RSI) was formed in 1989 by a consortium to market, process, and distribute data worldwide from Canada's RADARSAT-1 Earth-observation satellite.

RSI provides Earth-observation data and derived information products from commercially-available Earth-observation satellites, such as RADARSAT-1, LANDSAT, LANDSAT 5, LANDSAT 7, IKONOS, IRS, ERS, QuickBird, and ENVISAT.

In 1999, MacDonald Dettwiler completed a buy out of the other RSI shareholders. Today, RSI is a wholly owned subsidiary of MDA, under the name of MDA Geospatial Services Inc. (MDA GSI).

MDA GSI Hold the operating license for RADARSAT-2 satellite, an MDA Satellite built in partnership with the Canadian Government.

Peggy A. Nash (born June 28, 1951) is a Canadian labour official and politician from Toronto, Ontario, Canada. She is the New Democratic Party (NDP) Member of Parliament (MP) for the Parkdale—High Park electoral district (riding) in Toronto, and was the Official Opposition's Finance Critic, in Canada's 41st parliament. Before becoming a parliamentarian, she worked as a labour official at the Canadian Auto Workers union (CAW), where she became the first female to negotiate a major contract with one of the Detroit-based automobile corporations in 2005. She was first elected as the MP for Parkdale—High Park in the 2006 federal election. In the 2008 federal election, she was defeated in her re-election bid by Liberal candidate Gerard Kennedy. After her defeat, Nash returned to her previous job as a labour official with the CAW. She was elected to a two-year term as the federal NDP's President on August 15, 2009, at the party's convention in Halifax, Nova Scotia. She ran for parliament again in the 2011 federal election, and defeated Kennedy, to regain her former seat in the Canadian House of Commons.

Paul W. Dewar, MP (born January 25, 1963) is a Canadian educator and politician from Ottawa, Ontario. He is the New Democratic Party (NDP) Member of Parliament (MP) for the riding of Ottawa Centre.

Dewar was first elected to the House of Commons in the 2006 federal election. He served as the Official Opposition Critic for Foreign Affairs, until he left the post in October 2011 to run for the leadership of the NDP. Before entering politics he worked as a teacher and was an elected representative of the Ottawa-Carleton Elementary Teachers' Federation.

Paul Dewar was born in Ottawa, Ontario on January 25, 1963 to parents Ken Dewar and former Ottawa mayor and New Democratic Member of Parliament, Marion Dewar. When he was in grade three, Dewar was diagnosed with dyslexia, after his teacher noticed that he was struggling to read and write. He earned a Bachelor of Arts degree from Carleton University in political science and economics in 1985.

Not long after he completed his Bachelor of Arts, Dewar embarked on a five-month trip to Nicaragua, where he volunteered as an aid worker. Following his return to Ottawa, he began working as constituency assistant to Ontario Minister of Health and NDP Member of Provincial Parliament for Ottawa Centre, Evelyn Gigantes. Dewar served in this position from 1990 to 1995.^{[citation needed]} It was during this time that he met his wife, Julia Sneyd. They later had two children together: Nathaniel and Daniel.