Ionosphere images from Alouette satellites

Designed and assembled in Canada, Alouette-1 was the first satellite built by a nation other than the United States or the Soviet Union. It was constructed at a time when most satellites had a useful lifespan of a few months. Although Alouette-1 was as complex as any previously launched satellite, rapidly advancing technology and the extreme care exercised in all phases of Alouette-1’s development had led the Canadian builders to expect that their satellite would operate for at least 1 year. However, Alouette-1 operated for 10 years. In its first 3 months of operation, Alouette-1 produced some of the most exciting data obtained during the entire 50-year history of ionospheric research, and it continued to provide valuable information until its 10th birthday.

Alouette-1 is best known for its swept-frequency topside sounder experiment. The other experiments (VLF, cosmic noise, and energetic particle measurements) were, however, equally successful, and they also remained operational for 10 years. The Alouette-1 mission resulted in over 300 publications in refereed scientific journals. About 80 percent of Alouette-1 publications were based on the ionograms obtained from the topside sounder experiment. In its first 3 years of operation, Alouette-1 obtained over a million ionograms, each equivalent to a snapshot of the ionosphere from the Alouette-1 altitude of 1000 km down to an altitude of about 300 km. These ionograms have provided data at all geomagnetic latitudes and at geographic latitudes ranging from 80° N to 80° S. After 10 years, Alouette-1 had produced 2 million ionograms.

Please note that the metadata and parameters extracted from the ionogram images (see more about the extraction process) found in the "Processed ionogram data" file are provided primarily for demonstration purposes. These values are subject to error, and should not be directly used in a scientific context.

Explore this data using CSA's Alouette micro application, available here: https://donnees-data.asc-csa.gc.ca/alouette.

Resource list table
Resource name Resource type Format Language Links
Ionosphere images from Alouette satellites - Dataset Dataset Other   other No linguistic content; Not applicable Download Download the resource named : Ionosphere images from Alouette satellites - Dataset
Data specifications Alouette-I Guide DOCX   DOCX English Download Download the resource named : Data specifications Alouette-I
Data specifications Alouette-I Guide DOCX   DOCX French Download Download the resource named : Data specifications Alouette-I
Alouette 1 data restoration Guide DOCX   DOCX English Download Download the resource named : Alouette 1 data restoration
Alouette 1 data restoration Guide DOCX   DOCX French Download Download the resource named : Alouette 1 data restoration
Reference Sheet Dataset XLSX   XLSX No linguistic content; Not applicable Download Download the resource named : Reference Sheet
Preview (experimental)
Reference Sheet Dataset CSV   CSV No linguistic content; Not applicable Download Download the resource named : Reference Sheet
Preview (experimental)
Microfiches Dataset Other   other No linguistic content; Not applicable Download Download the resource named : Microfiches
Processed ionogram data **See warning in description Dataset CSV   CSV No linguistic content; Not applicable Download Download the resource named : Processed ionogram data **See warning in description
Preview (experimental)

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Last updated October 1, 2021, 17:17 (UTC)
Created July 13, 2021, 16:22 (UTC)
Licence Open Government Licence - Canada
Date modified: