On the way back to Earth, Al Worden took the very first deep-space walk - at what was then the record distance of 315,000 kilometers (196,000 miles) from Earth - retrieving film cassettes from the panoramic and mapping cameras from the rear of a
subsatellite that they had sent into orbit two days previously: "I spent 38 minutes working in the vacuum of space, getting a perfect view of both my home planet and the Moon at the same time," explained Al Worden.
Each scan spot covers a 9-km square on the Earth's surface along the
subsatellite track.
A small camera
subsatellite will watch the cratering process unfold from about a kilometer way in space, taking an image every second for later downlink to Earth while the mother ship hides behind Ryugu.
The temporal order of
subsatellite trackes is illustrated in Figure 2.
The aim of this paper is to reveal the impact dynamics of a tethered
subsatellite system under tether constraint.
where m is the number of CCD valid elements, n is the number of quantization bits, [f.sub.L] is the push-broom line frequency, f is the focus of space cameras, H is the average height of satellite orbit, V is the
subsatellite point velocity, and a is the CCD pixel size.
When [omega] = [pi]/2 or 3[pi]/2, i = 2e, it yields [([lambda] - [[lambda].sub.0]).sup.2] + ([[phi].sup.2] [approximately equal to] [i.sup.2] and the
subsatellite ground track is approximately a circle.
This instrument and its
subsatellite will make coordinated observations with the agency's Tail Probe, launched last August to explore the cometlike tail of Earth's magnetosphere.
Once the
subsatellite path meets the equatorial plane the ascending node N location can be identified.
The view coverage of EOS can be formed on the ground by the
subsatellite point of satellite platform as well as the view angle, swing angle, and tilting angle of satellite payload [12-14].