Mohammad Idrees Munir

US Patent:

20120097797, Apr 26, 2012

Filed:

Dec 15, 2011

Appl. No.:

13/326654

Inventors:

Byoungsam Woo - San Jose CA, US
Mohammad Saghir Munir - Union City CA, US
Kam K. Chan - Saratoga CA, US

Assignee:

SPACE SYSTEMS/LORAL, INC. - Palo Alto CA

International Classification:

B64G 1/10
G05D 1/00
B64G 1/24

US Classification:

2441586, 701 3

Abstract:

Three-axis spacecraft momentum management is performed for a spacecraft traveling along a trajectory, by an actuator including at least one thruster disposed on a single positioning mechanism. As the spacecraft travels along the trajectory, a desired line of thrust undergoes a substantial rotation in inertial space. When the spacecraft is located at a first location on the trajectory, the single positioning mechanism orients the thruster so as to produce a first torque to manage stored momentum in at least one of a first and a second of the three inertial spacecraft axes. When the spacecraft is located at a second location on the trajectory, the single positioning mechanism orients the thruster so as to produce a second torque to manage stored momentum in at least a third of the three inertial spacecraft axes.

US Patent:

20120303185, Nov 29, 2012

Filed:

May 25, 2011

Appl. No.:

13/115370

Inventors:

Mohammad Saghir Munir - Union City CA, US
John Hutton Cooper - Sunnyvale CA, US
Philip Conway Hirschberg - Fremont CA, US

Assignee:

SPACE SYSTEMS/LORAL, INC. - Palo Alto CA

International Classification:

B64G 1/24
G05D 1/00

US Classification:

701 13

Abstract:

Stored momentum on a spacecraft is managed by determining a target profile of stored momentum as a function of time for the spacecraft; measuring a difference between a momentum value actually stored on the spacecraft and a desired momentum value, where the desired momentum value substantially conforms to the target profile at a particular time; reducing the difference by producing a torque on the spacecraft, where the torque results from selectively controlling at least one solar array position offset angle, the offset angle being an offset of at least one solar array of the spacecraft from a nominal sun pointing direction.

US Patent:

20140278209, Sep 18, 2014

Filed:

Mar 13, 2013

Appl. No.:

13/798104

Inventors:

Mohammad Saghir Munir - Union City CA, US

Assignee:

Reticle Labs LLC - Union City CA

International Classification:

G01B 21/16

US Classification:

702150

Abstract:

This invention allows tracking of a defect across multiple inspections. The inventive solution translates every inspection record into a common set of fields that are first archived into a relational database. Then the defect coordinates from the inspection records of the same mask are all transformed into a common reference frame having the same origin and orientation with respect to the mask coordinate system. Following this, the defect having coordinates within a given tolerance distance are paired up and reported to the user.