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Calsphere 1, 2, 3, 4

Calsphere [NRL]

The Calsphere (Calibration Sphere) satellites were passive spherical surveillance calibration target built by the Naval Research Laboratory (NRL).

Nation: USA
Type / Application: Radar calibration
Operator: Naval Research Laboratory (NRL)
Contractors: Naval Research Laboratory (NRL)
Equipment:
Configuration:
Propulsion: None
Power: None
Lifetime: Passive
Mass: 1.4 kg (#1); 4 kg (#2); 4.5 kg (#3); 5 kg (#4)
Orbit:
Satellite COSPAR Date LS Launch Vehicle Remarks
Calsphere 1 1962 βτ 5 13.12.1962 Va 75-1-1 P Thor-DM21 Agena-D with Poppy 1A, Poppy 1B, Injun 3, Surcal 2
Calsphere 2 (NRL-PL 158 ?) 1965-065H 13.08.1965 Va 75-1-1 Thor-DSV2A Able-Star with Transit-O 5, Long Rod, Tempsat 1, Dodecapole 2, Surcal 5
Calsphere 3 (NRL-PL 160) 1967-053A 31.05.1967 Va SLC-2W Thor-DM21 Agena-D with Poppy 5A, Poppy 5B (GGSE 4), Poppy 5C, Poppy 5D (GGSE 5), Timation 1, Calsphere 4, NRL-PL 150B, OPS 5712
Calsphere 4 (NRL-PL 159) 1967-053F 31.05.1967 Va SLC-2W Thor-DM21 Agena-D with Poppy 5A, Poppy 5B (GGSE 4), Poppy 5C, Poppy 5D (GGSE 5), Timation 1, Calsphere 3, NRL-PL 150B, OPS 5712

References: