This paper deals with the hardware implementation of base band (acquisition and tracking) modules of a GPS receiver using system generator 9.2 has been tried out. The implementation will be tested on Lyrtech (small form factor-software defined radio) platform which consists of 3 layers. The upper layer is the radio frequency (1 GHz) layer, middle layer is the ADACMasterIII layer and the last is...

Typically, low-pressure sprayers are used to uniformly apply pre- and post-emergent herbicides to control weeds in crop rows. An innovative machine for weed control in inter-row and intra-row areas, with a unique combination of inter-row cultivation tooling and intra-row band spraying for six rows and an electro-hydraulic side-shift frame controlled by a GPS system, was developed and evaluated....

The registration and geometric recti cation of airborne scanner imagery is an essential prerequisite for the processing and analysis of this type of images. The Digital Photogrammetric Assembly (DPA) is an airborne camera consisting of three pan-chromatic line arrays for stereo imaging and four line arrays for multi-spectral imaging. For georeferencing the sensor system is completed by a module...

I . ABSTRACT JPL is developing novel RF tracking sensors for both of NASA’s New Millennium Program constellation missions, ST-3LStarLight and ST-5. ST-3/StarLight9 the Separated Spacecraft Inlerferometer, is a two-satellite formation in heliocentric orbit designed to demonstrate various technologies required for space interferometry. Scheduled for a 2006 launch. ST-3 will fly JPL’s Autonomous F...

The Low Power Transceiver (LPT) is an advanced signal processing platform that offers a configurable and reprogrammable capability for supporting communications, navigation and sensor functions for mission applications ranging from spacecraft TT&C and autonomous orbit determination to sophisticated networks that use crosslinks to support communications and real-time relative navigation for form...

The Atmosphere and Climate Explorer Plus (ACE+) is an atmospheric sounding mission using radio occultation techniques. The mission is a response to ESA ́s 2nd Call for Earth Explorer Opportunity Missions in 2001 and was ranked no. 1 out of 25 candidate missions. ACE+ will considerably advance our knowledge about atmosphere physics and climate change processes. The mission will demonstrate a high...