All environment control devices (heaters, dome-heater, auxiliary heater, cooling-fan), as well as the illumination and electrical outlets used during service visits to the GLIP, can be remote-controlled via the housekeeping unit (Section A.4). If the housekeeping unit fails, the environment control settings fall back to safe hardware-defined values.
During the midnight sun period, the black surfaces visible through the dome are exposed to intense sunlight and might reach high temperatures (up to about C has been measured.) As ALIS is not imaging during this season, the domes are replaced with opaque covers during summertime. This also keeps the need for cleaning the domes (and thus the risk of scratches) to a bare minimum, by not exposing the dome to bird-droppings and insects. For summertime operations an air-conditioning device (cooler) is required so as not to exceed the temperature specifications of the equipment inside the dome.