Abstract: An isothermal heat pipe system for transferring heat from a primary fluid, such as geothermal water or steam, municipal water system, solar heated water, or the like, to another medium to be heated isothermally, such as a road or bridge deck surface, includes an elongated enclosed chamber with a volatile liquid, such as ammonia or freon, contained therein, a heat exchanger tube positioned to run through the chamber in contact with the volatile liquid, and elongated distribution pipes connected in fluid-flow relation to and extending upwardly from the upper portion of the common chamber above the level of the volatile fluid and extending into divers portions of the medium to be heated in spaced-apart relation to each other in such a manner that there is a continuous downward gradient in each of the distributor tubes from the distal end thereof to the chamber.

Abstract: A system is provided for remote determination of the attitude of a moving hicle. The system utilizes two remotely located transmitting-receiving stations and two retroreflecting single plane roof prisms mounted on the vehicle which may exhibit high angular rates about a roll axis. The two remotely located transmitter-receiver stations provide laser tracking of the vehicle, continuously illuminating the vehicle with a laser beam located at each station so that the position of the vehicle relative to the remote stations is obtained. During tracking, the roof prisms located symmetrically on the vehicle provide both a return signal to the laser station regardless of the aspect angle of the vehicle and a doppler signal indicative of the vehicle aspect angle, from which the vehicle attitude is determined.

Abstract: A system is provided for remote determination of the attitude of a vehicle. nboard the vehicle are located two separate arrays of corner cube retroreflectors. Each array of retroreflectors is arranged to form a band around the vehicle at one axial position. The two arrays of reflectors incorporate different optical filters so that each array of reflectors and filters is optimized to provide retroreflection in a particular narrow band of the optical spectrum. Each array's optical spectrum band is different from the band used by the other array of reflectors. The system utilizes a remotely located transmitting-receiving station to provide tracking of the vehicle, continuously sweeping the vehicle with a light source located at the station so that position and attitude of the object, relative to the remote station, are obtained.

Abstract: A system is provided for remote determination of the attitude of a vehicle. he system utilizes two remotely located transmitting-receiving stations and two retroreflecting single plane roof prisms mounted on a vehicle which may exhibit high angular rates about a roll axis relative to the angular rates about two other orthogonal axes. The two remotely located transmitter-receiver stations provide tracking of the vehicle, continuously illuminating the vehicle with a light source located at each station so that the position of the object relative to the remote stations is obtained.

Abstract: A laser attitude detection and guidance system which uses a number of gro base laser transmitter/detector stations and at least two retroreflecting arrays on the missile to track and determine attitude correction signals to be sent for correcting the attitude of the missile relative to a predetermined trajectory.