Onward and no change of altitude.
Change of altitude, it is suggested.
A more common form of radio altimeter, better suited for measuring rate of change of altitude, transmits waves continuously and derives the height from the phase difference between the transmitted signal and that reflected from the ground.
This latest mission helped World View show that it can manage those changes successfully, and it also marks the first time any high-altitude balloon has managed a controlled change of altitude while operating in the stratosphere.
The driving mode was a steady ground speed of 70 mph (speedometer reading) or about 113 km/h, looking for flat sections of road to eliminate error due to the change of altitude.
We refer to these as altitude functions to provide an intuitive sense of their analytic role: if some measure of "altitude" is low on the CSS and high on an SSI, and if the expected rate of change of altitude along system trajectories is nonincreasing, then it is unlikely for trajectories to reach this SSI from the CSS.
A slight change of altitude, a huge change in the weather conditions and landscape.
The aircraft was descending steadily, and there had been no abrupt change of speed, altitude or direction.
These include the video surveillance system, seismic sensors, regular surveys and satellite monitoring of the changes in altitude of roofs, sidewalks and streets.
