| Orbit | Sun | Summer and winter solstices |
| Albedo | Extreme values depending upon the thermal response time of the hardware. |
| Earthshine | Extreme values depending upon the thermal response time of the hardware. |
| Altitude | From 270 to 460 km |
| Ascending node | Regarding the:- Eclipse time- Incident flux reflected by ISS- Incident flux variations- ISS shading |
| ISS | Attitude | Roll, yaw, pitch = ±15°, ±15°, ±15° |
| Assembly stage | From ERA installation to ISS final assembly stage with and without docked space vehicles |
| Configuration | Orientation of the solar arrays and of the gyrodine radiators |
| Payload configuration | Large payload location |
| Boundary T | Radiators temperatures. These depend upon ISS operations and are therefore treated as boundary temperatures |
| Radiation case | BOL or EOL properties of the outer surface thermo-optical properties |
| ERA | Location on ISS | Basepoint positions |
| Configuration | Hibernation position or any reference position taken by ERA during an operation |
| S/S configuration | For the basic end effector: rigidised / non rigidised |
| Radiation case | BOL or EOL properties of the outer surface thermo-optical properties |
| Thermal response time | Each unit has a different thermal response time |
| Operation | ERA operation mode | Hibernation – standby – peak modes |
| Mission | Installation, maintenance and inspection missions defined by a sequence of reference tasks |
| Time lines | Motor and electronics duty cycles total operating time |
| Internal power dissipation | Maximum or minimum dissipation due to voltage variation and other uncertainties |
| Constraints | Related to safety |