Portal:Spaceflight/On This Day/1 April
- 1960 - A Thor-Able launches the first weather satellite, TIROS-1.
- 1963 - A Thor-Agena launches a CORONA satellite.
- 1971 - A Delta E launches the ISIS_(satellite) satellite.
- 1971 - A Tsyklon-2 launches the Kosmos 402 satellite.
- 1975 - A Vostok-2M launches a Meteor satellite.
- 1980 - A Soyuz-U launches the Kosmos 1170 satellite.
- 1992 - A Soyuz-U launches the Kosmos 2182 satellite.
- 1993 - A Kosmos-3M launches the Kosmos 2239 satellite.
- 2002 - A Molniya-M launches the Kosmos 2388 satellite.