CCD Observations at CCD Observations at ZimmerwaldZimmerwald

Werner Gurtner

Astronomical Institute

University of Bern

ILRS Workshop

3-7 October 2005

Eastbourne

Station Zimmerwald

SLR/CCD

GPS: IGS

Gravimeter (ETH)

Schmidt/Cassegrain

GPS/GLONASS

Radar

Temp/Rel.H

LV95 Referenzpunkt

ZIMLAT: Optical axes

Camera

Instrument platform

Object: 79105A Camera: CCD42-40

Field of view: 14‘ x 13‘ Date: 23-Sep-2005 22:58:51 UT

7 geostationary Astra satellites(12x12‘)

CCD Control SystemCCD Control System

ZIMLAS(VMS Alpha)

Telescope PC(DOS)

Telescope

ZimControl(Linux PC)

Time Server(Windows PC)

Camera Server(Windows PC)

Planning Tool(Solaris)

Data Archive(Solaris)

Camera Server(Linux PC)

CAMAC PC(DOS)

CAMAC

tcp/ip

tcp/ip

tcp/ip

tcp/ip

tcp/ip

ftp

CCDSLR

CCD Interleaving with SLRCCD Interleaving with SLR

SLR schedule is generated and executed according to satellite priorities

CCD controller periodically requests observation time

SLR/Telescope controller grants or rejects requests depending on satellite priority and remaining pass time

If granted: CCD controller sends object positions or orbits to SLR/Telescope controller for execution

Operator (if present) can overrule automatic activities