Data Management Services for Linfield College

This document describes the data management services available to researchers at Linfield. For researchers who would like to be able to copy and paste sections from this document for use in their data management plans, please download the version in Microsoft Word, available from the additional files section

File Formats for Data Management Plans

This document describes the tiers of support which Linfield is able to provide for various file formats. For researchers who would like to be able to copy and paste sections from this document for use in their data management plans, please download the version in Microsoft Word, available from the additional files section

Occultation of a compact radio source by Venus

An occultation of the compact radio source P 0507+17 by Venus on 19 Jul. 1988, was observed in Tidbinbilla, Australia at a frequency of 2.3 GHz. The purpose of this observation was to measure the position of Venus in the radio reference frame. When data from both ingress (Venus dayside) and egress (Venus nightside) were used to solve for the position of Venus in ecliptic longitude and latitude, the results were consistent with zero offsets from the nominal values, with an uncertainty of approximately 0.2 arcsec in both coordinates. By using the nightside data alone, a value of -0.026 +/- 0.04 arcsec was obtained for the linear combination delta(lambda) + 0.51delta(beta), where delta(lambda) and delta(beta) were the offsets from their nominal values of the ecliptic longitude and latitude of Venus. Distortion of a vacuum Fresnel fringe pattern by the Venus troposphere, and especially by the Venus ionosphere, was observed. The dayside ionosphere of Venus caused very large distortions; the amplitude of the first Fresnel fringe in the ingress data was eight times larger than was expected for an airless planet. The observed fringe patterns were modeled by using plausible ionospheres (i.e., consistent with spacecraft measurements of the Venus ionosphere and with solar extreme ultraviolet flux and solar wind pressure measurements at the occultation epoch). However, the range of Venus ionospheric profiles (electron density as a function of altitude) allowed by a priori constraints and by the occultation data was large (e.g., the ionopause height on the dayside was uncertain by a factor of two). This ionospheric uncertainty (particularly on the dayside) translated into a large position uncertainty (0.2 arcsec for the dayside and 0.04 arcsec for the nightside). If it was possible to calibrate the Venus ionosphere by some external means, the accuracy in delta(lambda) and delta(beta) would have been 0.01 arcsec or better

Table of Contents

Table of contents for Volume 1, Issue 1 of the Linfield Magazin

Alumni News

Schedule of upcoming events and brief articles about alumni activitie

Back Cover

Information about Linfield’s Sesquicentennial Plaz

Back Cover

Debbie (Hansen) Harmon ‘90, director of capital giving, Jake Harmon ‘26 and Dave Hansen, vice president for student services and dean of students, model Wildcat spirit in quality apparel from the Linfield College Bookstore

Guide to the Anthropology Collection

This collection follows the correspondence trails of a number of members of the American Baptist Church and its missionaries in India. It also includes collected religious materials and articles

Professional Bootcamp

Launching a new career has less to do with resumes and more to do with relationships

From Presidents to Preschoolers

Linfield’s Potter Hall has a rich history, for both Linfield College and McMinnville. Originally built as the home of George W. Evens, a former mayor of McMinnville, the college purchased it in 1918 for use as the President’s House