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Tekijä: | Pihlflyckt, Jörgen |
Työn nimi: | Control and Measurement System for Multi-Channel Microwave Radiometer |
Julkaisutyyppi: | Diplomityö |
Julkaisuvuosi: | 2007 |
Sivut: | vii + 62 Kieli: eng |
Koulu/Laitos/Osasto: | Sähkö- ja tietoliikennetekniikan osasto |
Oppiaine: | Sovellettu elektroniikka (S-66) |
Valvoja: | Sepponen, Raimo |
Ohjaaja: | Hallinen, Martti |
Elektroninen julkaisu: | http://urn.fi/urn:nbn:fi:tkk-007760 |
OEVS: | Sähköinen arkistokappale on luettavissa Aalto Thesis Databasen kautta.
Ohje Digitaalisten opinnäytteiden lukeminen Aalto-yliopiston Harald Herlin -oppimiskeskuksen suljetussa verkossaOppimiskeskuksen suljetussa verkossa voi lukea sellaisia digitaalisia ja digitoituja opinnäytteitä, joille ei ole saatu julkaisulupaa avoimessa verkossa. Oppimiskeskuksen yhteystiedot ja aukioloajat: https://learningcentre.aalto.fi/fi/harald-herlin-oppimiskeskus/ Opinnäytteitä voi lukea Oppimiskeskuksen asiakaskoneilla, joita löytyy kaikista kerroksista.
Kirjautuminen asiakaskoneille
Opinnäytteen avaaminen
Opinnäytteen lukeminen
Opinnäytteen tulostus
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Sijainti: | P1 Ark S80 | Arkisto |
Avainsanat: | radiometer measurement control |
Tiivistelmä (eng): | The Laboratory of Space Technology has built several microwave radiometers over the years, and in 1994 the laboratory purchased a used short SC7 skyvan aircraft in order to perform airborne measurements with these radiometers. The large rear door opening allowed more instruments to be fitted at the same time, and it was decided to build additional radiometer receivers in order to more completely match the frequencies of the near-future satellite microwave radiometers. To accomplish matching frequencies, new receivers were needed at frequencies 6.8 GHz, 10.65 GHz and 18.7 GHz. This thesis describes the control and measurement system for these three new receivers. Chapter 1 briefly describes the background motivation behind the HUTRAD system, and chapter 2 contains a short theoretical introduction to different radiometer types. The general design of the measurement system is described in chapter 3, and all the different subsystems are presented briefly at a block diagram level. The computer hardware and associated interfacing cards used are also described here. The measurement software is also briefly presented, even though the software is not part of the work of this thesis. Chapter 4 contains the most important part of the author's work for this thesis. A special low-frequency amplifier with an integrating analog-to-digital conversion system based on a monolithic voltage-to-frequency converter chip was designed, and is described in detail here. There are also a few additional electronic circuits designed by the author described here. The functionality tests and some measurement results are presented in chapter 5, and the conclusions from these measurements and the most important lessons learned from this work are presented in chapter 6. |
ED: | 2007-05-10 |
INSSI tietueen numero: 34013
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