polar antenna
51MESSENGER — This article is about the NASA space mission. For other uses, see Messenger. MESSENGER Artist s rendering of MESSENGER orbiting Mercury. Operator NASA / APL Major contractors APL …
52List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …
53Indian Deep Space Network — IntroductionThe Indian Deep Space Network is established at Byalalu, a village close to Bangalore. The Network consist of a fully steerable 18m and a 32m DSN antenna which improves the visibility duration when compared with the existing ISRO… …
54Collocation (remote sensing) — Collocation is a procedure used in remote sensing to match measurements from two or more different instruments. This is done for two main reasons: for validation purposes when comparing measurements of the same variable, and to relate… …
55Oceansat-2 — Operator Indian Space Research Organisation Bus IRS Mission type Oceanography …
56Directivity — Diagram showing directivity In electromagnetics, directivity is a figure of merit for an antenna. It measures the power density the antenna radiates in the direction of its strongest emission, versus the power density radiated by an ideal… …
57Jicamarca Radio Observatory — Infobox Telescope bgcolour = name = Jicamarca Radio Observatory caption = organization = [http://geo.igp.gob.pe Instituto Geofisico del Peru] ,Cornell University, National Science Foundation location = coord|11|57|05|S|76|52|27.5|W| wavelength =… …
58Antártida — Para la película chilena, véase Antártida (película). «Antártica» redirige aquí. Para otras acepciones, véase Antártica (desambiguación). Antártida …
59Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
60Ship gun fire-control system — Mk 37 Director c1944 with Mk 12 (rectangular antenna) and Mk 22 orange peel Ship gun fire control systems (GFCS) enable remote and automatic targeting of guns against ships, aircraft, and shore targets, with or without the aid of radar or optical …
