SERTS-89
1989/05/05

Grazing Incidence (SERTS-A)

Gold Coated

Kodak 101A Film

• First fully successful flight.

SERTS-91
1991/05/07

Grazing Incidence (SERTS-C)

Multilayer 300-355 A

Kodak 101A Film

• First multilayer grating in space.

• Higher resolution telescope.

SERTS-93
1993/08/17

Grazing Incidence (SERTS-C)

Multilayer 300-355 A

Kodak 101A Film

• First flight of video slit-jaw-camera for real-time pointing control.

• First Yohkoh collaboration.

SERTS-95
1995/05/15

Grazing Incidence (SERTS-C)

Multilayer 170-220 A

Kodak 101A Film

• First flight of new multilayer for 2nd order.

• First Coronas-I collaboration.

SERTS-96
1996/11/13

Grazing Incidence (SERTS-C)

Multilayer 300-355 A

Intensified Kodak 3072x2048 CCD

• First flight of electronic detector.

• Substantial instrument damage; SERTS-C telescope lost.

SERTS-97
1997/11/18

Grazing Incidence (SERTS-A)

Multilayer 300-355 A

Intensified Kodak 3072x2048 CCD

• First end-to-end calibration at RAL.

• First cross-calibration of SOHO/CDS,EIT.

• First flight of full-disk EUV monitor (USC).

SERTS-99
1999/06/24

Normal Incidence (SERTS-E)

Multilayer 300-355 A

Intensified Kodak 3072x2048 CCD

• First flight of Normal Incidence Telescope.

• SOHO cross-calibration.

• Improved detector - better resolution MCP.

• Improved cooling system, right up to launch.

• Implementation of on-board memory.

SERTS-00
2000/07/26

Normal Incidence (SERTS-E)

Multilayer 300-355 A

Intensified Kodak 3072x2048 CCD

• More efficient grating (x3).

• SOHO cross-calibration.

• Improved telemetry & on-board memory.

• First flight of digital pointing control.

• First flight of biotech extremeophiles (UMd).