Methods and apparatus for determining parameters for an array are described. An exemplary embodiment of a method determines a set of parameters for an antenna array including multiple array elements, the array being fed by a feed array including a plurality of feed elements. The embodiment of the method includes measuring a plurality of bistatic ranges Rijk through different signal path combinations, each signal path combination from a feed element “i,” to an array element “j,” and to a feed element “k”. The measuring includes radiating energy from feed element “i”, and reflecting some of the radiated energy from array element “j” back to feed element k of the feed array. The measured bistatic ranges are processed to solve for the set of parameters. Another embodiment of a method is for measurement of multiple array elements of an array, and includes radiating energy from one or more array elements, reflecting some of the radiated energy from a set of reflector elements back to the array elements each reflector element having a variable phase shifter associated therewith, cycling each reflector element phase shifter through a range of phase shifter settings at a unique rate, processing the received signals to extract a phase of the reflected energy as received at each element; and using the extracted phase for each element to determine a relative location of each array element.