A scientific satellite was launched to observe X-ray radiation(XMM,later called Newton).The mission continues to make observation.The collecting area for this spacecraft includes an interesting co-axial multi-mirror assembly acting as a lens for X-rays.Associated mirror related technologies have been revisited for other purposes and it was obvious,that accurate panel technology could result,of interest to terrestrial radio-telescopes.For space projects,ESA did launch Herschel and Planck Spacecraft,each with an interesting antenna providing the collective area to carry out the mission specific activities.Associated Radio-Physical topics included the precise assessment of reflection loss of the reflectors.In fact accurate testing of surface properties led to results which have been used as calibration knowledge for Planck mission in orbit.It has to be very important to be quantitatively accurate for millimeter instrumentation.Spin-off considerations included ALMA related panel performances,as well as other high precision reflectivity measurements,including for Bepi Colombo mission(to Mercury).The combination of above mentioned aspects led to precise panel assemblies,which have been installed on 25 radio telescopes in the ALMA project.The presentation intends to discuss actual panel realization for ALMA and perspectives for more to come.Increased precision would allow for that.For mm/submm tasks in Space the reflector assembly becomes an important task,given the fact that it is not that simple available and that stowage and deployment is needed.