Abstract: An absolute vector gravimeter and method of use is provided. The absolute vector gravimeter includes one or more single axis accelerometers, each capable of pointing in at least two directions and calculating an estimated gravity component. Further embodiments provide for estimating a bias in the single axis accelerometer, as well as measuring non-ballistic accelerations along multiple axes and calculating estimated gravity components for each. A resultant non-ballistic acceleration vector can be calculated. Examples for reducing the RMS error in the estimated gravity components are also provided.

Abstract: A cryogenic coil assembly including a coil substrate with a flat surface, and a number of radial channels cut into a region of the flat surface. The cryogenic coil assembly also includes a spiral coil covering the radial channels, and a chemical bonding agent for bonding the spiral coil to the coil substrate. The chemical bonding agent is present within the radial channels.

Abstract: A system and method for protecting an electronics module on a spacecraft in space are described. The system includes a non-radiation hardened electronics module electrically connected to a power supply, with a switch connected between the power supply and the electronics module. The switch can disconnect the electronics module from the power supply in response to an event signal. A sensor which is capable of detecting a solar proton event is connected to the switch. The sensor emits the event signal upon detection of the solar proton event.

Abstract: A cryogenic coil assembly including a coil substrate with a flat surface, and a number of radial channels cut into a region of the flat surface. The cryogenic coil assembly also includes a spiral coil covering the radial channels, and a chemical bonding agent for bonding the spiral coil to the coil substrate. The chemical bonding agent is present within the radial channels.

Abstract: An electronic measuring device is described that can include first and second input inductors connected in series. A shunt inductor is connected in parallel with the second input inductor. Optionally, an additional shunt inductor may also be used in parallel with the first input inductor. The first and second input inductors are inductively coupled to first and second SQUIDs which are in turn inductively coupled to first and second feedback inductors. First and second SQUID controllers are connected, respectively, to the first and second SQUIDs as well as the first and second feedback inductors. The first and second SQUID controllers are also connected to a processor. The processor is operable to process the output of the first and second SQUID controllers to detect unlocking events in the output of the first SQUID controller.