LDEF temperature histories: a simple theory

Damping models for flexible communications satellites by substructural damping synthesis

Space structure vibration modes: how many exist? Wich ones are important?

Finite-element analysis of CTS-like flexible spacecraft

Dynamics of large flexible solar arrays and application to spacecraft attitude control system design

Geometrical properties in state space of linear differential equations with periodic coefficients

The effects on automatic landing lateral performance of interference to the I.L.S. localizer by reflection from an aircraft taking-off

This Report describes analogue simulation studies and full scale flight experiments into the affects on automatic landing lateral performance of interference to the I.L.S. localizer caused by reflection from an aircraft taking-off. The results show that if safety is not to be affected, interference must cease before the landing aircraft has...

A flight experiment to determine the effects of flare entry conditions on automatic landing performance

A flight experiment is described which was designed to confirm the results of an analogue computer study of the effect of initial conditions at the entry to the flare-out on the touchdown performance of au automatic landing system. The flight results generally justify the conclusions from the computer study but differences appear at high initial...

Spin decay of a class of satellites caused by solar radiation

Subsonic tests in free molecule flow on impact tube pressure probes having a wide range of tube lengths at angles of attack up to 90º

Theory for the free molecule impact probe at an arbitrary angle of attack

Development and flight testing of a lithium chloride ice concentration meter

Though several instruments are available for the in-flight measurement of atmospheric ice concentration, they all have some limitations. This Note describes some early development work on an ice concentration meter employing a lithium chloride cell which appears potentially capable of overcoming these limitations. The lithium chloride ice meter...

A flight assessment of height loss during instrument overshoot in the Comet Mk 3B aircraft

A flight experiment is described to determine the height loss during a manual blind overshoot following a positive warning to the pilot during the late stages of an automatic approach. The loss of height was found to depend on the rate of descent at the overshoot height and the variability of pilot performance but no other factors were found to...

Table of the artificial earth satellites launched in 1957-61

A Table is given of all known artificial earth satellites, including fragments, launched before 1st January, 1962, with lifetimes, weights, dimensions and details of the orbits at specified dates. The methods used in compiling the Table and the difficulties encountered are briefly described.

Scale height in the upper atmosphere, derived from changes in satellite orbits

The orbits of needle satellites

The formation of belts of Needle satellites, which have been proposed for long-range radio communication, is discussed. The perturbations of these belts are investigated by studying the combined effects of solar radiation pressure and the earth's gravitational potential on satellites of large area-to-mass ratio.