Engineering Papers⌕ Search

Engineering topics

Hatch, W.

Publications and source records attributed to Hatch, W..

6 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS2009

Receivers for the Microwave Radiometer on Juno

Six receivers for the MicroWave Radiometer (MWR) are currently under development at JPL. These receivers cover a frequency range of 0.6 to 22 GHz in approximately octave steps, with 4 % bandwidth. For calibration and diagnosis three noise diodes and a Dicke switch are integrated into each receiver. Each receiver is connected to its own antenna which is mounted with its bore sights perpendicular to the spin axis of the spacecraft. As the spacecraft spins at 2 RPM, the antenna field of view scans Jupiter's atmosphere from limb to nadir to limb, measuring microwave emission down to 1000-bar.

microwaves↗
NASA NTRS2000

Ka-band Solid State Power Amplifier (KAPA)

Communications subsystems for furture missions must be low-mass and enable equivalent if not great data return to the scientific community over the current X-band (8.4 GHz) links.

Ka-band Solid State Power Amplifier Deep Space One↗
NASA NTRS1975

MANSEE data analysis results

Results of the data reduction and analysis for the Marine Navigation Systems Evaluation Experiment (MANSEE) are presented. Topics discussed include: the MANSEE test; the navigation sensors which were exercised; the ground truth instrumentation and the processing of ground truth data; and the residual statistics for individual navigation sensors. Residuals were calculated by differencing the actual measurements with anticipated measurements computed from the ground truth trajectory. The results obtained by using the SEAMAP program to filter data from the navigation sensors are also presented. The resultant filtered trajectories were differenced with the corresponding ground truth trajectories to obtain navigation position and velocity errors.

Hatch, W.↗