Space missions to comets : a conference /

Includes bibliographies.

Permanent missions to the United Nations.

Mode of access: Internet.

Principles of Muhammadan law : an essay at a complete statement of the personal law applicable to Muslims in British India /

Includes bibliographical references and index.

Study of interplanetary missions to Mercury through Saturn with emphasis on manned missions to Venus and Mars 1973/82 involving capture.

At head of title: GD/A 63-0916.

Instructions of the Prudential Committee of the American Board of Commissioners for Foreign Missions to the Sandwich Island Mission.

Mode of access: Internet.

History of American missions to the heathen, from their commencement to the present time.

Mode of access: Internet.

Two discourses preached before the University of Cambridge, on commencement Sunday, July 1, 1810 : And a sermon preached before the Society for Missions to Africa and the East; at their tenth anniversary, July 12, 1810. To which are added Christian researches in Asia /

With this is bound "The star in the East," a sermon, preached in the Parish Church of St. James, Bristol, on Sunday, Feb. 26, 1809. 3rd American edition ... To which is added an Appendix, containing the interesting report of the Rev. Dr. Kerr, to the governor of Madras, on the state of the ancient christians in Cochin and Travancore ... New York, Williams & Whiting, 1809. 56 p.

New model of Christian missions to popish, Mahometan, & pagan nations explained, in four letters to a friend.

Mode of access: Internet.

Islam, a challenge to faith;

Mode of access: Internet.

The redemption of the red man; an account of Presbyterian missions to the North American Indians of the present day,

Mode of access: Internet.

Simulation of optical observables for space missions to small bodies

The navigation of deep space spacecraft requires accurate measurement of the probe’s state and attitude with respect to a body whose ephemerides may not be known with good accuracy. The heliocentric state of the spacecraft is estimated through radiometric techniques (ranging, Doppler, and Delta-DOR), while optical observables can be introduced to improve the uncertainty in the relative position and attitude with respect to the target body. In this study, we analyze how simulated optical observables affect the estimation of parameters in an orbit determination problem, considering the case of the ESA’s Hera mission towards the binary asteroid system composed of Didymos and Dimorphos. To this extent, a shape model and a photometric function are used to create synthetic onboard camera images. Then, using a stereophotoclinometry technique on some of the simulated images, we create a database of maplets that describe the 3D geometry of the surface around a set of landmarks. The matching of maplets with the simulated images provides the optical observables, expressed as pixel coordinates in the camera frame, which are fed to an orbit determination filter to estimate a certain number of solve-for parameters. The noise introduced in the output optical observables by the image processing can be quantified using as a metric the quality of the residuals, which is used to fine-tune the maplet-matching parameters. In particular, the best results are obtained when using small maplets, with high correlation coefficients and occupation factors.

Travels and adventures of the Rev. Joseph Wolff.

Edited by Alfred Gatty.

Alternative Transfers to the NEOs 99942 Apophis, 1994 WR12, and 2007 UW1 via Derived Trajectories from Periodic Orbits of Family G

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

On the steric and mass-induced contributions to the annual sea level variations in the Mediterranean Sea

The sea level variation (SLVtotal) is the sum of two major contributions: steric and mass-induced. The steric SLVsteric is that resulting from the thermal and salinity changes in a given water column. It only involves volume change, hence has no gravitational effect. The mass-induced SLVmass, on the other hand, arises from adding or subtracting water mass to or from the water column and has direct gravitational signature. We examine the closure of the seasonal SLV budget and estimate the relative importance of the two contributions in the Mediterranean Sea as a function of time. We use ocean altimetry data (from TOPEX/Poseidon, Jason 1, ERS, and ENVISAT missions) to estimate SLVtotal, temperature, and salinity data (from the Estimating the Circulation and Climate of the Ocean ocean model) to estimate SLVsteric, and time variable gravity data (from Gravity Recovery and Climate Experiment (GRACE) Project, April 2002 to July 2004) to estimate SLVmass. We find that the annual cycle of SLVtotal in the Mediterranean is mainly driven by SLVsteric but moderately offset by SLVmass. The agreement between the seasonal SLVmass estimations from SLVtotal – SLVsteric and from GRACE is quite remarkable; the annual cycle reaches the maximum value in mid-February, almost half a cycle later than SLVtotal or SLVsteric, which peak by mid-October and mid-September, respectively. Thus, when sea level is rising (falling), the Mediterranean Sea is actually losing (gaining) mass. Furthermore, as SLVmass is balanced by vertical (precipitation minus evaporation, P–E) and horizontal (exchange of water with the Atlantic, Black Sea, and river runoff) mass fluxes, we compared it with the P–E determined from meteorological data to estimate the annual cycle of the horizontal flux.

Journal of the Rev. Josepf Wolff ... : in a series of letters to Sir Thomas Baring, Bart. : containing an account of his missionary labours from the years 1827 to 1831 : and from the years 1835 to 1838.

Mode of access: Internet.