Excellence in
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Excellence in
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Excellence in
Cryogenic Solutions

Callisto News

Callisto is seeking to recruit an Optical/Electro-Optical communications engineer experienced in Optical Ground Stations to join a team of engineers working in Darmstadt Germany.


Callisto recherche un technicien électronique, électrotechnicien  ou mécanique polyvalent pour intégrer l'équipe technique composée de 5 ingénieurs et un technicien pour son site de Villefranche de Lauragais.


Callisto is seeking to recruit a satellite communications engineer experienced in satellite Ground Stations to join a team of engineers working in Darmstadt Germany.
Candidates must be University qualified to at least first degree level and with at least 5 years professional experience in relevant to the areas of expertise listed below.


Callisto is pleased to announce that it has been awarded a contract by
Thales  Alenia  Space,  Toulouse  to  supply  Low  Noise  Amplifiers  (LNAs)
operating in the 25.5 to 27 GHz Band for the Meteosat Third Generation
(MTG) project.  The LNAs will be installed in four antennas making up
the  Missions  Data  Acquisition  ground  stations  for  MTG.    The  order
comprises  the  LNAs  as  well  redundancy  switching  components  and
associated Controller/Power Supply units.


In order to improve the G/T of ESA Deep Space Antennas (DSA) by 2dB, a new cryogenic receiver will be developed in collaboration with the University of Cantabria.


Description :

Callisto est amené à développer une carte de contrôle pour un atténuateur RF digital. Cette carte permettra de régler le niveau d'atténuation de l'atténuateur. Cette carte devra aussi comporter une interface avec l'utilisateur (contrôle et surveillance).
Le stage démarrera par une phase d'étude puis se poursuivra avec la réalisation d'une carte prototype. Suivant l'avancement du stage et le niveau du stagiaire, une mise en boitier de cette carte pourra être envisagée.


Callisto is pleased to announce that the manufacture of the prototype of a new "Compact", zero maintenance cryogenic receiver including the Caltech designed QRFH feed has started!

This new RF receiver is being developed to meet the VGOS specification for VLBI. It could also be used for more general radio astronomy applications.
The design is focused on low maintenance, very low power consumption with Noise Temperature performance that meets the VGOS requirements. This is a state-of-the-art piece of equipment for telescopes all over the world but with particular interest for those operated in remote locations where energy costs are high and maintenance logistics is particularly complex and expensive.
The preliminary design work, de-risking activities and detailed design work completed in 2014 have produced good results with the completion of resistance and leak tests on a large vacuum window and cryogenic and RF tests that showed correct operations of the QRFH feed and LNAs at cryogenic temperatures.
The expected performance of the compact QRFH cryogenic receiver is confirmed but more importantly the de-risking work showed that the receiver can be operated at a better noise temperature than initially expected.


At the end of 2014 Callisto has delivered three additional X Band Compact maintenance free cryo LNAs.
These LNAs have 18K of Noise temperature between 8 and 8.5GHz.

To learn more on Maintenance free Cryo LNA follow this link


Following this link:


Images and Science already returned by the orbiter and the Philae lander are amazing!

The team at Callisto is very proud to be part of this European venture with the cryogenic Low Noise Amplifiers (LNA) designed by Callisto and installed in ESA Deep Space Stations around the world.


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