Abstract: An electronic calorie counter is disclosed which provides a digital readout of the rate of caloric consumption with exercise by the user by sensing the vertical component of the motion of the user, and translating that motion into electronic impulses. The vertical component of the user's motion is constantly detected using a magneto-electric transducer in combination with means for defining an opto-electric axis in the transducer. The output of the opto-electric means is combined with a clock-controlled gate to provide a burst of impulses over a unit of time which is proportional to the vertical acceleration sensed. The gate output is supplied to a program-controlled processor utilizing a mathematical equation derived to analyze caloric consumption in humans with exercise. The processor is also responsive to several input switches indicating the physical parameters of the individual user in calculating caloric consumption.

Abstract: A projectile carrying a Loran processor is directed to a target along a line, referred to as a lorhumb line, which is the locus of all points i for which TDA- TDA.sub.i /TDB- TDB.sub.i is constant. Any deviation results in a cross-track error directing the projectile back on a correct path to the target. No vertical tracking is necessary because the projectile is flown near to the target and caused to execute a ballistic foldover so that it travels vertically downward towards the target. During vertical descent an along-path error signal is generated to control the vertical fins of the projectile.