Tag Archives: satellites

xyHt Magazine September 2017 Issue

To view this issue as it appears in full in print, click the cover: Articles from this issue include: Go for the Beer! Recording, Registration, and Cadastres: Comparing systems for real-property management in the Netherlands and the United States. GPR Revisited: Arrays of multiple sensors and advances in processing breathe new life into the field...

GNSS

Above: The third satellite in IRNSS being tested before its successful launch. What Did Not Happen and Increases, Improvements, Innovations Sometimes the most telling precursors of the future are things that did not happen. By all accounts, 2014 should be remembered a horrible, terrible, very bad GNSS year with botched launches, toxic broadcast ephemerides, near peak...

Satellite Imagery’s Impact

Above: The highest resolution of commercial satellite imagery is still more than an order of magnitude lower than the highest resolution attainable from aerial platforms. Keystone Aerial Surveys, Inc. developed this digital surface model from 1.75 cm digital imagery taken with a low-altitude flight. The resolution is sufficiently high to enable its use for mapping...

New Markets for Satellite Imagery

In June, the U.S. Department of Commerce, granting a request by DigitalGlobe, gave the company permission to sell its imagery at the best resolutions available from its current constellation. Additionally, six months after its new WorldView-3 satellite is operational, DigitalGlobe will be permitted to sell imagery at a resolution of up to 0.25 meters panchromatic and...

It’s About Time

Australia tech-rebel company Locata is poised to profoundly change the world of positioning, navigation, and timing. In 1994 in Canberra, Australia, accomplished musician and entrepreneur Nunzio Gambale was introduced to a fellow musician, David Small, by Gambale’s cousin who had been giv­ing Small a hand with an interesting experi­ment. This chance meeting began an amazing partnership in technological development. The scenic capital territory of Austral­ia has its fair...

Satellite Imagery for Precision Agriculture

Precision agriculture consists primarily of using geospatial technologies to map spatial variations in crop and soil conditions and to match inputs—such as water, seed, and fertilizer—to those variations by applying them at variable rates. The link between the spatial variations and the variable rates are zone maps and prescription maps. The former show the difference...