Today we received the first titanium housings for the BiSon74ET-RH.
As we already had the 2mm thick sapphire membranes on stock it was quite easy to generate a first impression of what this sensor will look like once completely assembled. Therefore we would like to present a sneak preview of the sensors today.
Designed in frame of an Artes 5.2 contract (for the use on extendable solar panels of Geostationary telecom satellites) and currently under production, the BiSon74ET-RH is a sunsensor that is to exhibit an unprecedented operating temperature range of +125C till -125C in combination with a very high level of radiation tolerance.
At a mass of less than 25 grams and with a 4 by 4 cm mounting pattern, the sensors are small, reliable and by virtue of the batch manufacturing used for all Bison sunsensors very affordable. The wide temperature range in combination with photodiodes that have been tested up till 1.1Mrad and 10^16 1MeV electrons and are shielded by a 2mm thick sapphire window, this sensor is expected to be able to fulfil the environmental requirements for just about any mission.
The field of view is larger than for the normal BiSon64 sunsensors as the sensors were produced with a specific large volume mission in mind, but a BiSon64ET-RH can be developed quite fast and qualified on basis of similarity in majority if required. for information please contact firstname.lastname@example.org or give us a call at +31 71 2020 123
Lens R&D is currently developing extended temperature sunsensors in frame of an ESA Artes 5.2 contract. These sensors are expected to show an unprecedented operating temperature range of -125C till +125C with the intention to even reach a -145C operating temperature.
These temperature ranges are required to operate a sunsensor directly on an extendable solar panel of geostationary satellites.
These satellites are know to have solar panels who’s temperature can go up to +110C at end of life and go down to -110C (at worst case eclipses that can last more than three hours) at the Beginning of live of the satellite a couple of days a year.
Extending the operating temperature to -145C will even allow to operate (without heating) on various exo-planetary science missions, missions to the moon or highly elliptic orbits.
Manufacturing Readiness Review has been successfully completed, and a parts are being manufactured at various places. The first parts received and first inspections performed have convinced us that we are on track to develop a sunsensor with an unprecedented temperature range that will open up new applications.
In order to limit program risks, some first order (brutal) testing has been performed on the prototype units like liquid nitrogen dipping.
The qualification units are expected to be ready by the end of November after which qualification testing is expected to last some 200 days due to the large temperature ranges and high number of thermal cycles involved.
Increased radiation tolerance obtained by increasing the window thickness from 0.65 to 2mm Sapphire (providing 3mm Al equivalent shielding) in combination with the radiation hardened photodiodes (that have been tested to 1.1Mrad at ESTEC and 10^16 1MeV electrons/cm2 at IRI will probably lead to a buy and forget type of sensor that can meet just about any mission requirement.
Calculated weight of the BiSon74ET-RH (with a 74 degree field of view in diagonal and 68 degree field of view on axis) is less than 25 grams.
For further information you can contact email@example.com or call +31 71 2020 123
After two days of intensive auditing, today the supplier audit of Airbus/Oneweb was succesfully completed with very good results. The auditing not only comprised a carefull assessment of the procedures and way of working at Lens R&D but also included a company visit to some of our key suppliers (Boers & co and Lasertec)
After two days of information exchange, the meetings concluded with the mutual filling in of an audit matrix. Although this showed that we didn’t get the highest score on maturity for many points, this was not due to the fact that we don’t have the procedures in place or the way of working was not appreciated, but due to the fact that we were asked to offer a project specific design which has yet to be finalized.
Before this design is completed, it is obvious that many documents are not yet produced and/or tailored to the product, so we are not ready for full production yet. Nevertheless, the fact that we are seriously considered as a supplier is seen as a major step forward in being accepted as a player in the field of sunsensors for space applications to be reckoned with. Moreover, the fact that we have been asked to propose a dedicated design means we are also seen as a viable sensor design house. All in all two very busy but rewarding days.
Airbus/Oneweb is a joint venture specifically formed to develop and operate a large constellation of 648 small satellites which is to bring high speed internet access to the whole world. http://oneweb.world/