Update on DOSTEL measurements in COLUMBUS within the DOSIS/DOSIS3D projects

Abstract

Two Silicon‐detector based DOSimetry TELescopes (DOSTELs) have been measuring the cosmic radiation in the COLUMBUS module of the International Space Station since 2009 and have now recorded data over more than one solar cycle covering the maxima of galactic cosmic ray intensity in 2009 and 2020 and the intensity minimum in between. Dose rates in the ISS orbit from galactic cosmic radiation and trapped particles from the radiation belt in the South Atlantic Anomaly over this time are presented. The variation of dose rates over the solar cycle and the dependency on the geomagnetic shielding quantified by the cut‐off rigidity are investigated. Using dose rates measured at low geomagnetic shielding and correcting for the altitude dependent shielding from Earth against cosmic radiation, the expected dose and dose equivalent rates from galactic cosmic radiation in near‐Earth interplanetary space are derived. In addition to the data as measured with the DOSTEL instruments a short update for the data as measured with the passive radiation detectors in the frame of the DOSIS and DOSIS 3D projects will be provided as well.