Leena Bhalerao Singh

20030150961, Aug 14, 2003

Oct 7, 2002

10/266068

Frederick Boelitz - Medford MA, US
Leena Singh - Lexington MA, US
Christopher Gibson - Cambridge MA, US
Stephen Smith - Wayland MA, US
Piero Miotto - Cambridge MA, US
Andrew Martin - Hallsville MO, US

B64G001/42

244/172000

A load relief system for a launch vehicle including a wind sensing system responsive to wind speed and direction at selected locations for providing an output of sensed wind speed and wind direction at the selected locations, a plant model responsive to the sensed wind speed and direction within a finite horizon, a current state of the launch vehicle, and control commands of the launch vehicle to predict the trajectory of the launch vehicle, an error circuit responsive to the predicted trajectory and a reference trajectory to produce a trajectory error, and an optimizer-responsive to the trajectory error and configured to provide control commands to compensate for wind load over the finite horizon of the launch vehicle by reducing the total angle of attack.

20170144781, May 25, 2017

Nov 23, 2016

15/360545

- Cambridge MA, US
Leena Singh - Lexington MA, US
Sungyung Lim - Acton MA, US
Timothy Henderson - Ashland MA, US

B64G 1/36

A conical scanning method and system is provided for orienting a spacecraft with respect to a source. The system includes a spacecraft and an incidence angle sensor secured to the spacecraft to sense a signal from a source. The incidence angle sensor has a boresight that is canted with respect to the principal axis. A processor communicates with actuators on the spacecraft to adjust an attitude of the spacecraft based on information received from the incidence angle sensor and to thereby align a principal axis of the spacecraft with a direction from the spacecraft to the source. The method and system can also rely on information received from source presence sensors. The source may be the Sun, or a non-solar signal source.

20150116155, Apr 30, 2015

Oct 24, 2014

14/523028

- Cambridge MA, US
Sungyung Lim - Acton MA, US
Timothy B. Easterly - Action MA, US
John M. Plump - Arlington MA, US
William W. McFarland - Watham MA, US
Leena Singh - Lexington MA, US

H01Q 3/34

342372

A communication system is provided. The communication system includes a directional antenna, an antenna steering system to steer the directional antenna, a memory, and one or more processors coupled to the memory, the directional antenna, and the antenna steering system. The one or more processors are configured to identify a communication target and state information associated with the communication target, instruct the antenna steering system to steer the at least one directional antenna towards the communication target based on the state information, instruct the antenna steering system to perform a received power scan within a scan area to determine a maximum received power direction associated with a signal transmitted from the communication target, and track the maximum received power direction.