Preliminary design study of a high resolution meteor radar

A design study for a high resolution meteor radar system is carried out with the objective of measuring upper atmospheric winds and particularly studying short period atmospheric waves in the 80 to 120 km altitude region. The transmitter that is to be used emits a peak power of 4 Mw. The system is designed to measure the wind velocity and height of a meteor trail very accurately. This is achieved using a specially developed digital reduction procedure to determine wind velocity and range together with an interferometer for measuring both the azimuth and elevation angles of the region with a long baseline vernier measurement being used to refine the elevation angle measurement. The resultant accuracies are calculated to be + or - 0.9 m/s for the wind, + or - 230 m for the range and + or - 0.12 deg for the elevation angle, giving a height accuracy of + or - 375 m. The prospects for further development of this system are also discussed

Development of an efficient procedure for calculating the aerodynamic effects of planform variation

Numerical procedures to compute gradients in aerodynamic loading due to planform shape changes using panel method codes were studied. Two procedures were investigated: one computed the aerodynamic perturbation directly; the other computed the aerodynamic loading on the perturbed planform and on the base planform and then differenced these values to obtain the perturbation in loading. It is indicated that computing the perturbed values directly can not be done satisfactorily without proper aerodynamic representation of the pressure singularity at the leading edge of a thin wing. For the alternative procedure, a technique was developed which saves most of the time-consuming computations from a panel method calculation for the base planform. Using this procedure the perturbed loading can be calculated in about one-tenth the time of that for the base solution

Within Katahdin’s Realm: Log Drives and Sporting Camps - Chapter 05: The Debsconeag Lakes Watershed

This book’s historical journey on Maine’s West Branch of the Penobscot River and its tributaries is in two parts, logging (chapters 1-7) and sporting camps (chapters 8-11), all of which Fogler Library hosts at its Digital Commons). The journey starts in 1825 when the first loggers began cutting along the river and driving their logs more than 70 river miles to the Bangor sawmills. It ends 151 years later in 1976, the year of the last drive. Maine’s sporting camp history in this region started with enterprising loggers and teamsters who were also trappers and guides who beginning about 1870 took adventurous persons to fishing and hunting locations where they used tents or small trapper’s camps or logging camps. By the early 1890s their camps became known as sporting camps. With few exceptions, I have included structures built through 1920. The text moves the reader upstream beginning where the Penobscot River forks at Nicatou Island with the East Branch leading north and the West Branch heading west-northwest. The reader travels up the West Branch into the Lower Chain Lakes and back into the river flowing under the shadow of Mount Katahdin to the Ripogenus Lake outlet where the journey ends. Along the way, each tributary is explored. The tributaries include Nollesemic Stream; Millinocket Stream and Lake, Sandy Stream; Nahmakanta, Rainbow and Pollywog streams; the Debsconeag Lakes chain; Abol, Katahdin, and Foss and Knowlton streams; and Jo-Mary Lakes, and Cooper and Pratt Brooks. The Introduction, Acknowledgements, and Table of Contents for all 11 chapters accompany chapter 1. The Epilogue, Sources of Information, Names and Related Information, and Glossary are with chapter 11. Chapter 5 includes these subsections: First and Second Debsconeag Lakes Third through Eighth Debsconeag Lakes Discovering More History on My Exploration

Maine Sporting Camp History on the Piscataquis River Tributaries, Part 3

Maine Sporting Camp History on the Piscataquis River Tributaries, Part 3: West from Milo on the Greenville Stage Road -- Epilogue -- Place Names -- Sources of Information Author\u27s abstract These sporting camps began to slowly develop in the mid-1870s and reached their heydays before the 1930s. To reach these camps, sports traveled on one of four land routes within the Piscataquis watershed. Each of these routes and the associated camps are the basis for chapters two through five. The first chapter traces the development of the settling along these routes and provides a context for the history of the camps. Chapter two includes the camps north and east of Brownville with their initial access from the Nahmakanta Tote Road. The Chamberlain Lake Tote Road provided the access to the camps in chapter three. The Pleasant Valley Tote Road led to the camps in chapter four. The Greenville Stage Road was the means of access to the camps in chapter five. This written history is complemented with a pictorial history that includes over 200 pictures. The sources of information section focuses on the repositories for the materials cited in the footnotes. The totality of the book (with no cover) is three downloads. The first includes the introductory material and chapters one and two. The second has chapters three and four. The third contains chapter 5, the epilogue, place names, and sources of information. A previous edition of this text first appeared on the Fogler Library Digital Commons in 2017; “Piscataquis Project: Sporting Camps in the Piscataquis Watershed, (Parts A, B, C, and D). This edition, which is still available, did not include pictures, the epilogue, place names, and sources of information

Log Driving on the West Branch of the Penobscot River: An Addendum to Alfred Hempstead\u27s Book The Penobscot Boom and The Development of the West Branch of The Penobscot River for Log Driving

Alfred Hempstead’s late 1920’s research on logging on the West Branch of the Penobscot and its tributaries resulted in his publication of The Penobscot Boom and The Development of the West Branch of The Penobscot River for Log Driving in 1930. No other publication containing such a collection of information preceded his work and none have been printed since. Hempstead’s research, which is frequently cited, focused on determining when logging began on the river and each of its main tributaries, how loggers worked in cooperation with each other, and what they needed for infrastructure for the drives. In some situations Hempstead made calculated guesses about when something took place, in others he shared what he could find, and in several he simply acknowledged he could not find the information for which he was looking. Hempstead did not have resources such as the index to Maine Legislative Acts and Resolves, computer word searches for newspaper archives and other printed matter, online census type data, the indexed collections at the Maine State Archives, and logging families’ personal papers that have been collected by historical societies and libraries around the State of Maine. These sources lead to answers of some of Hempstead’s questions, more information about some of the tributaries he mentions, and clarification of particular events. This article traces the sequence of events from 1828 to 1976, noting that log drives and use of some of the dams Hempstead wrote about continued for another 41 years after he completed his book in 1930

Within Katahdin’s Realm: Log Drives and Sporting Camps - Chapter 06: Nahmakanta Stream and Lake Watershed

This book’s historical journey on Maine’s West Branch of the Penobscot River and its tributaries is in two parts, logging (chapters 1-7) and sporting camps (chapters 8-11), all of which Fogler Library hosts at its Digital Commons. The journey starts in 1825 when the first loggers began cutting along the river and driving their logs more than 70 river miles to the Bangor sawmills. It ends 151 years later in 1976, the year of the last drive. Maine’s sporting camp history in this region started with enterprising loggers and teamsters who were also trappers and guides who beginning about 1870 took adventurous persons to fishing and hunting locations where they used tents or small trapper’s camps or logging camps. By the early 1890s their camps became known as sporting camps. With few exceptions, I have included structures built through 1920. The text moves the reader upstream beginning where the Penobscot River forks at Nicatou Island with the East Branch leading north and the West Branch heading west-northwest. The reader travels up the West Branch into the Lower Chain Lakes and back into the river flowing under the shadow of Mount Katahdin to the Ripogenus Lake outlet where the journey ends. Along the way, each tributary is explored. The tributaries include Nollesemic Stream; Millinocket Stream and Lake, Sandy Stream; Nahmakanta, Rainbow and Pollywog streams; the Debsconeag Lakes chain; Abol, Katahdin, and Foss and Knowlton streams; and Jo-Mary Lakes, and Cooper and Pratt Brooks. The Introduction, Acknowledgements, and Table of Contents for all 11 chapters accompany chapter 1. The Epilogue, Sources of Information, Names and Related Information, and Glossary are with chapter 11. Chapter 6 includes these subsections: Nahmakanta Drainage: Nahmakanta Stream to Nahmakanta Lake Pollywog Pond Drainage: Pollywog Stream to Penobscot Pond Rainbow Drainage: Rainbow Stream to Rainbow Lak