Določanje višine oblakov iz enega satelitskega posnetka

magistrsko delo

Viktorija Stojcheska (Author), Krištof Oštir (Mentor), Dejan Grigillo (Co-mentor), Klemen Zakšek (Co-mentor)

Abstract

V magistrskem delu je opisan postopek določanja višine oblakov iz enega samega satelitskega posnetka. Nalogo smo poskusili rešiti na dva načina. V prvem načinu smo določali višine oblakov na satelitskem posnetku RapidEye. Zaradi konstrukcijske lastnosti skenerjev, ki jih sateliti RapidEye uporabljajo za snemanje Zemlje, obstaja majhna časovna zakasnitev zajema med različnimi spektralnimi kanali. Zato nastane pojav paralakse % objekti, ki so nad Zemljo (oblaki), so na posnetkih vidni barvno zamaknjeni. V prvem načinu smo izkoristili paralakso in na podlagi znanih časovnih zakasnitev med kanali in izmerjene paralakse izračunali višine oblakov. V drugem načinu je bila uporabljena metoda struktura iz gibanja. Iz fotografij z Mednarodne vesoljske postaje smo izdelali fotogrametrični oblak točk, iz katerega je bilo treba določiti višino oblakov. Zaradi slabe natančnosti pridobljenih rezultatov je potrebna nadaljnja raziskava uporabe te metode za določanje višine oblakov.

Keywords

geodezija;magistrska dela;GIG;satelitski posnetki;sateliti;spektralni kanali;paralaksa;oblaki;identični točki;fotogrametrični oblak točk;RapidEye;struktura iz gibanja;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.09 - Master's Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[V. Stojcheska]
UDC:	528.8:629.783(043.3)
COBISS:	8820065
Views:	1268
Downloads:	328
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Cloud top height estimation from a single satellite image
Secondary abstract:	The master thesis describes the process of cloud top heights estimation from a single satellite image. We attempted to solve the problem in two different ways, by using two different methods. With the first method, we estimated the clouds% top heights by using a RapidEye satellite image. Due to the construction features of the RapidEye scanners, there is a small acquisition time gap between different spectral bands. Therefore, the parallax occurs % the objects that are high above the Earth (clouds) in the images are colour-shifted. In the first method we used the parallax and, based on the known time gaps between spectral bands and the measured parallaxes, we calculated the height of the clouds% tops. In a second technique, the method structure from motion was used. By using the photographs taken from the International Space Station, we generated a photogrammetric point cloud from which we estimated the height of the clouds. Due to the poor accuracy of the results obtained, a further study of the use of this method for determining the height of clouds is required.
Secondary keywords:	geodesy;master thesis;satellite images;satellites;spectral channels;parallax;clouds;image matching points;photogrammetric point cloud;RapidEye;Structure from Motion;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	X, 48 str.
ID:	11149671