b)

Orbital height (Lo): The perpendicular distance between the supraorbital and infraorbital margins of the orbit.

A Walker Constellation consists of three integer parameters: the number of satellites T, the number of orbit planes P, and the phase factor between satellites in adjacent planes F, and two other orbital parameters: the

orbital height h, and the inclination i.

The increased use of lightweight Cube-Sats (100 mm cubes) has brought solar sails to the fore for slow manoeuvring and raising

orbital height.

However, this value of Leo-SAR is around 9.8% since its

orbital height is low and the effect of perturbation force is obvious.

The

orbital height of the satellite has been modified to 600 km above the earth's surface compared to 690 km, which is the current orbit of DubaiSat-1.

Despite its thousand-mile

orbital height, the 100-foot aluminized balloon rivals 1st-magnitude stars, catching the attention of even casual watchers.

using (14) and taking into account that M [much greater than] m we further obtain (15), where M is the source of the gravitational field = the mass of the Earth in our case [M.sub.e], and R is the radius of the massive body = [R.sub.e], and r = [R.sub.e] + [z.sub.orb] it's

orbital height plus Earth radius for an Earth-based satellite.

The $10million Ansari X Prize was last week award-ed to Scaled Composites for launching Spaceship One, a privately built, reusable, craft to

orbital height twice within a fortnight.

Strictly speaking, this only applies to objects at exactly the same

orbital height as the centre of mass (CM) of the satellite.

The orbital length and height (4.22 [+ or -] 0.009 cm and 3.86 [+ or -] 0.005 cm, respectively) was more in left than right orbit (4.04 [+ or -] 0.007 cm and 3.81 [+ or -] 0.004 cm, respectively), which was disagreement with the finding of Sarma where orbital length was more in left orbit, while the right orbit showed more

orbital height. Similarly, orbital depth and circumference were recorded more in the right orbit (4.66 [+ or -] 0.004 and 13.49 [+ or -] 0.009 cm, respectively) than the left one (4.61 [+ or -] 0.003 and 13.09 [+ or -] 0.01 cm, respectively) in blackbuck.

Dnepr's launch of the UAE satellite is expected to give it better

orbital height and inclination in space.