Satellite and Telescope Technology

 


Satellite

The satellite bus is based on an existing bus that meets all requirements of the mission in the basic configuration. Individual technical components are being optimized and adapted for the implementation and operation of the telescope. One major challenge is the position control of the satellite, which requires a positioning accuracy of 10 arc seconds and a tracking stability of 0.1 arc seconds over 60 seconds.

Satellite Bus Public Space Telescope

Telescope

The telescope is based on a Ritchey-Chrétien-Cassegrain Design with a primary mirror of 80 cm. The mirror is provided with a suitable surface coating for the UV range at 100 nm. An axial re-focus system permits the fine tuning of the position of the focal plane. A mechanical shutter at the radiation entrance of the telescope protects all optical systems from direct sun exposure and impurities.

Optic Design Public Space Telescope

VIS/NIR Imager

Three CCD sensors are available to be used, covering the spectral range between 300 nm and 1.000nm. For special requirements, partitions of the sensors can be used (RoI). All CCD sensors can be used in conjunction with narrow and broadband filters that the user can select individually.

UV Spectrograph

The high resolution ultraviolet spectrograph provide our understanding of atomic and molecular process in a large range of astrophysical environments.


Imager Public Space Telescope
Satellite Bus Public Space Telescope


Data transfer

The data transmission between satellite and earth will be effected via the ground station in Svalbard (Norway), which will be flown over about every 105 minutes. The uplink of commands to the satellite control and for monitoring orders and the downlink telemetry data is in the S-band between 2 GHz and 4 GHz. High qualitiy scicence data transmittet from the satellite to the ground station in Svalbard. The downlink is carried out with X-band in the frequency range between 8 GHz and 12 GHz. From the ground station in Norway all data will be transferred to the Public Telescope Server and will then be provided to the users.

Astronomy

The use of the space telescope by scientific organizations will be effected via the Public Telescope Proposal System. Observation proposals will be collected and allocated. Private astronomers, students and teachers will use the telescope via the Public Telescope Online Platform. Observation requests can be entered and the platform will manage them accordingly. The observation jobs of all users are assembled into sequences and transmitted to the satellite via the ground station. There they are processed and stored to be transmitted to the ground station at the next flyover. Then, if necessary, an automated post-processing of the images and data will be carried out. The data will be provided to the users.

Satellite Bus Public Space Telescope
Satellite Bus Public Space Telescope