A suspension lamp includes a switch box, a wire connection base, a circuit board, a power supply wire, a plurality of protective jackets, a plurality of connecting terminals, and a plurality of electric wires. The method takes advantage of received GPS signals and received crosslink signals among spacecraft to estimate the effect of ionospheric delays and correct for such delays in the computation of the range estimation between spacecraft. Each support formation defines a pair of hook-like holding formations in which the hem ring of the condom can be received and held in an arrangement permitting unrolling of the hem ring when donning the condom. 8 mm or less, and a hardness of 50 or greater and 60 or less.