Validation of international space station electrical performance model via on-orbit telemetry

On-Orbit Performance Degradation of the International Space Station P6 Photovoltaic Arrays

“…Over the 2½ year period from June 1996 and December 1998, the MCSA operating current (not Isc) degraded 3.7% per year (Kerslake and Hoffman, 1999). This value is lower than the predicted degradation rate of 4.5% per year but more than twice as high as that predicted for NASA/TM-2003-212513 6 American Institute of Aeronautics and Astronautics ISS SAWs.…”

“…These correction factors were calculated using the validated computer code SPACE (Delleur and Kerslake, 2002). SPACE is a tool developed to model the ISS Electric Power System (EPS) and has been shown to be very accurate (Jannette, et al, 2002). The four factors used to correct the data are: * Solar flux (FLUX) -adjusts for variation of solar insolation throughout the year.…”

Adaptation and Re-Use of Spacecraft Power System Models for the Constellation Program

“…Since then, SPACE development has progressed to the current version (3.3) which has been thoroughly validated against on-orbit telemetry (ref. 5) and remains in daily use to support the ISS program and its partners.…”

Electrical performance of the international space station US photovoltaic array during bifacial illumination

“…With the first United States photovoltaic array launched, installed, and activated on flight 4A (early December 2000), the on-orbit data can now be compared to analytical predictions derived from the authors' previously published work on back-illuminated performance modeling (Delleur, Kerslake, et al, 1999) and albedoenhanced performance modeling Hoffman, 1997, 1999). A photograph of the US PVAs (2B and 4B) on ISS is shown in Figure 1.…”

“…Figure 3 shows the backside of PVA panels containing seriesconnected, 8cm by 8cm crystalline silicon solar cells with gridded back contacts and copper flat printed circuit interconnects (Vogt and Proeschel, 1988, Hashmi, 1993, Lillington, et al, 1988.…”