Assessment of intercalibration methods for satellite microwave humidity sounders

Three methods for intercalibrating humidity sounding channels are compared to assess their merits and demerits. The methods use the following: (1) natural targets (Antarctica and tropical oceans), (2) zonal average brightness temperatures, and (3) simultaneous nadir overpasses (SNOs). Advanced Microwave Sounding Unit-B instruments onboard the polar-orbiting NOAA 15 and NOAA 16 satellites are used as examples. Antarctica is shown to be useful for identifying some of the instrument problems but less promising for intercalibrating humidity sounders due to the large diurnal variations there. Owing to smaller diurnal cycles over tropical oceans, these are found to be a good target for estimating intersatellite biases. Estimated biases are more resistant to diurnal differences when data from ascending and descending passes are combined. Biases estimated from zonal-averaged brightness temperatures show large seasonal and latitude dependence which could have resulted from diurnal cycle aliasing and scene-radiance dependence of the biases. This method may not be the best for channels with significant surface contributions. We have also tested the impact of clouds on the estimated biases and found that it is not significant, at least for tropical ocean estimates. Biases estimated from SNOs are the least influenced by diurnal cycle aliasing and cloud impacts. However, SNOs cover only relatively small part of the dynamic range of observed brightness temperatures.

Transportation for older Americans - issues and options for the decade of the 1980's. Final report.

Transportation Department, Washington, D.C.

The soul of the Bantu; a sympathetic study of the magico-religious practices and beliefs of the Bantu tribes of Africa,

Mode of access: Internet.

Morris as work-master : a lecture delivered by W.R. Lethaby at the Birmingham Municipal School of Art on the 26th of October, 1901.

With: "The study and practice of artistic crafts" / by W.R. Lethaby.

The Tippecanoe text-book : compiled from Niles' register and other authentic records /

Port. on t.-p.

Leadwork, old and ornamental, and for the most part English.

Mode of access: Internet.

Suggestions for the speedy and secure conveyance of our reinforcements to Canada.

Contains two letters: The first letter was addressed to Viscount Melville and dated London 16th December, 1826; and the second letter for private distribution was addressed to Captain Sir W. Symonds, dated London, 21st April, 1838 under title: A second letter on the conveyance of troops to Canada / by Capt. Bowles.

Book-plates,

Mode of access: Internet.

The sale of food & drugs acts, 1875-1907 : and forms, regulations, orders and notices issued thereunder, with notes and cases together with an appendix containing the other acts relating to adulteration, chemical notes, etc., etc. /

Mode of access: Internet.

Land areas : or, How to calculate and verify contents of tracts of land /

Mode of access: Internet.

New tracks in North America : A journal of travel and adventure whilst engaged in the survey for a southern railroad to the Pacific Ocean during 1867-8 /

Disbound Original Held in Oak Street Library Facility.

Reconstruction, political and economic, 1865-1877 /

Includes index.