The Accuracy of the Distance Between Two Stations using Synchronous Optical Observations of the Artificial Satellites in Combination with One Laser Measurement

Afaf M. Abd El-Hameed

doi:10.3923/srj.2012.10.14

The Accuracy of the Distance Between Two Stations using Synchronous Optical Observations of the Artificial Satellites in Combination with One Laser Measurement

Space Research Journal ◽

10.3923/srj.2012.10.14 ◽

2012 ◽

Vol 5 (1) ◽

pp. 10-14

Author(s):

Afaf M. Abd El-Hameed

Keyword(s):

Optical Observations ◽

Artificial Satellites ◽

Laser Measurement

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CQSSP: A New Technique for Establishing the Tie Between the Stellar and Quasar Celestial Reference Frames

International Astronomical Union Colloquium ◽

10.1017/s0252921100064174 ◽

1991 ◽

Vol 127 ◽

pp. 341-347

Author(s):

T. Schildknecht ◽

I. Bauersima ◽

U. Hugentobler ◽

A. Verdun ◽

G. Beutler

Keyword(s):

Reference Frame ◽

Earth Rotation ◽

Reference Frames ◽

Terrestrial Reference Frame ◽

Optical Observations ◽

Artificial Satellites ◽

Satellite Orbits ◽

Earth Rotation Parameters ◽

A New Technique ◽

Celestial Reference Frame

AbstractUsing artificial satellites as transfer objects the project “Coupled Quasar-Satellite-Star Positioning” represents an independent method for linking quasar and stellar reference frames. Optical observations of close approaches between reference stars and satellites yield satellite positions in the stellar reference frame. On the other hand high precision satellite orbits in the International Earth Rotation Service (IERS) terrestrial reference frame are obtained from laser or radiometric observations. Using IERS earth rotation parameters and adopted transformation models the satellite and eventually the star positions can be expressed in the IERS quasar celestial reference frame. In this paper we describe the CQSSP project and assess its capability for providing an accurate tie between tho two metioned celestial reference frames.

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Observations of Space Debris

International Astronomical Union Colloquium ◽

10.1017/s0252921100003900 ◽

1991 ◽

Vol 112 ◽

pp. 153-164

Author(s):

L. G. Taff

Keyword(s):

Orbital Element ◽

Space Debris ◽

Artificial Satellite ◽

Optical Observations ◽

Artificial Satellites ◽

Deep Space ◽

Large Numbers ◽

Real Time Identification ◽

Earth Orbits ◽

Element Set

ABSTRACTOptical observations of near Earth and deep-space debris conducted at M.I.T.’s artificial satellite observatory will be discussed. A brief review of observing technique, regions of high debris density, and amount of debris in orbit will be given. The unique, duplex facilities of the observatory allow the discrimination of debris from meteors, the construction of an orbital element set, and real-time identification of cataloged artificial satellites. Near-Earth debris is present in large numbers in all the popular near-Earth orbits; at least 5-6 times the 5000-6000 objects in the NORAD catalog. In deep-space, the new presence of Ariane-related debris adds significantly to the existing population which is treble that cataloged by NORAD.

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Astronomical observation with the aid of artificial satellites

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1959.0211 ◽

1959 ◽

Vol 253 (1275) ◽

pp. 492-493 ◽

Cited By ~ 1

Keyword(s):

Wavelength Range ◽

Present Situation ◽

Optical Observations ◽

Optical Methods ◽

Astronomical Observation ◽

Artificial Satellites ◽

Image Converter ◽

Severe Restriction ◽

Night Sky ◽

Fair Degree

Optical observations from the ground are fraught with three major difficulties: (i) severe restriction of the wavelength range from 3000 to 8000 A; (ii) ‘spreading’ of the telescopic image due to atmospheric motions; (iii) night-sky background. The combination of (ii) and (iii) makes the observation of faint galaxies extremely difficult, although photoelectric techniques allow subtraction of the night-sky contribution to a fair degree, if one is willing to wait long enough. The present situation is that the attack on the problems of cosmology by longrange optical methods has largely lost its momentum, due in a very considerable measure to the above unfavourable factors. It is particularly to be noted that the development of more sensitive detection equipment, of the image-converter type, will not overcome these difficulties. Indeed such developments are likely to throw the limitations of terrestrial ground-based observation into still sharper relief.

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Artificial satellite orbit computations

Symposium - International Astronomical Union ◽

10.1017/s0074180900105662 ◽

1966 ◽

Vol 25 ◽

pp. 363-371

Author(s):

P. Sconzo

Keyword(s):

Artificial Satellite ◽

Satellite Orbit ◽

Artificial Satellites ◽

Orbital Elements ◽

Differential Correction ◽

Gravitational Effects ◽

Short Intervals ◽

The Subject ◽

Introductory Discussion ◽

Orbit Computation

In this paper an orbit computation program for artificial satellites is presented. This program is operational and it has already been used to compute the orbits of several satellites.After an introductory discussion on the subject of artificial satellite orbit computations, the features of this program are thoroughly explained. In order to achieve the representation of the orbital elements over short intervals of time a drag-free perturbation theory coupled with a differential correction procedure is used, while the long range behavior is obtained empirically. The empirical treatment of the non-gravitational effects upon the satellite motion seems to be very satisfactory. Numerical analysis procedures supporting this treatment and experience gained in using our program are also objects of discussion.

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