NOVELTY - A double-sided photovoltaic package (26) has an incident photovoltaic cell (32) and a reflective photovoltaic cell (34). Each photovoltaic cell has a corresponding absorbing surface for absorbing solar radiation. Incident and reflective photovoltaic cells are arranged so that the absorbing surface of the incident photovoltaic cell is located to receive incident non-reflected solar radiation and the absorbing surface of the reflective photovoltaic cell is located to receive reflected solar radiation.    USE - The double-sided photovoltaic package is used in photovoltaic arrays for absorbing direct and indirect solar radiations and converting the absorbed solar radiation into electricity used to power a control unit for satellite to function. It is useful for space applications.    ADVANTAGE - The incident photovoltaic cell converts incident solar radiation into electric power with maximum efficiency for incident non-reflective radiation. The reflective photovoltaic cell is optimized so that it converts incident solar radiation into electric power with maximum efficiency for incident reflected solar radiation. The double-sided photovoltaic package has a high power output per unit area and a flexible structure. It is capable of converting solar radiation incident on both incident and reflective photovoltaic cells, and thus, optimizes power generation and optimizes weight; and is more suitable for stringing together to form the photovoltaic arrays. The photovoltaic arrays comprising the double-sided photovoltaic packages simultaneously use solar radiation direct from the sun and solar radiation from the sun that has been subsequently reflected from the earth. Thus, because both sides of the photovoltaic array are capable of converting solar radiation into electric power, the power generated per unit area of the double-sided array is higher than a single-sided photovoltaic array.    DETAILED DESCRIPTION - A double-sided photovoltaic package (26) has an incident photovoltaic cell (32) and a reflective photovoltaic cell (34). Each photovoltaic cell has a corresponding absorbing surface for absorbing solar radiation. Incident and reflective photovoltaic cells are arranged so that the absorbing surface of the incident photovoltaic cell is located to receive incident non-reflected solar radiation; and the absorbing surface of the reflective photovoltaic cell is located to receive reflected solar radiation. The structure of the incident photovoltaic cell converts non-reflected light to electrical energy; and the structure of the reflective photovoltaic cell converts reflected light to electrical energy. The incident and reflective photovoltaic cells both comprise inverted metamorphic multijunction photovoltaic cells.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic cross-sectional view of a photovoltaic package.    Double-sided photovoltaic package (26)    Incident photovoltaic cell (32)    Reflective photovoltaic cell (34)    Dielectric adhesive (70)    Front metal contact (72a)    Back metal contact (72b)