{"id":{"repo_id":"greece","oai_identifier":"oai:10442/1042"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/1042","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΑΚΡΙΒΕΙΑΣ ΤΩΝ ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΩΝ ΜΕΤΡΗΣΕΩΝ ΑΠΟΣΤΑΣΕΩΝ ΜΕ ΤΗ ΒΟΗΘΕΙΑ ΣΤΑΤΙΣΤΙΚΩΝ ΜΕΘΟΔΩΝ","abstract":"USING A SAMPLE OF 2360 MICROWAVE DISTANCE MEASUREMENTS AND RELATED METEOROLOGICAL MEASUREMENTS (PRESSURE, TEMPERATURE AND HUMIDITY), A STUDY WAS CARRIED OUT AIMING TO IMPROVE THE EOM ACCURACY. THE BASIC TOOL IS MULTIPLE LINEAR REGRESSION(STEPWISE METHOD) AND SEVERAL MODELS WERE EXAMINED. THE STANDARD INDEPENDENT VARIABLES OF THESE MODELS WERE THE ABOVE MENTIONED METEOROLOGICAL VARIABLES AND THE DISTANCE (GIVEN BY THE EOM INSTRUMENT). THE DEPENDENT VARIABLE WAS THE VARIATION OF REDUCED DUE REFRACTIVE INDEX DISTANCE MEASUREMENTS. THE DERIVED MODELSDO SHOW REMARKABLE ACCURACY, STABILITY AND PREDICTION CAPABILITIES. THE USE OFQUALITATIVE VARIABLES IMPROVE THE MODEL STRENGTHS RECOVERING IMPORTANT INFORMATION ABOUT TIME AND POSITION. ALSO WITH THE HELP OF SOME MODELS THE INFLUENCE OF CLOUDS, WIND VELOCITY AND WIND DIRECTION IS PASSING INTO THEM FROM DETERMINISTIC POINT OF VIEW.","abstract_html":"USING A SAMPLE OF 2360 MICROWAVE DISTANCE MEASUREMENTS AND RELATED METEOROLOGICAL MEASUREMENTS (PRESSURE, TEMPERATURE AND HUMIDITY), A STUDY WAS CARRIED OUT AIMING TO IMPROVE THE EOM ACCURACY. THE BASIC TOOL IS MULTIPLE LINEAR REGRESSION(STEPWISE METHOD) AND SEVERAL MODELS WERE EXAMINED. THE STANDARD INDEPENDENT VARIABLES OF THESE MODELS WERE THE ABOVE MENTIONED METEOROLOGICAL VARIABLES AND THE DISTANCE (GIVEN BY THE EOM INSTRUMENT). THE DEPENDENT VARIABLE WAS THE VARIATION OF REDUCED DUE REFRACTIVE INDEX DISTANCE MEASUREMENTS. THE DERIVED MODELSDO SHOW REMARKABLE ACCURACY, STABILITY AND PREDICTION CAPABILITIES. THE USE OFQUALITATIVE VARIABLES IMPROVE THE MODEL STRENGTHS RECOVERING IMPORTANT INFORMATION ABOUT TIME AND POSITION. ALSO WITH THE HELP OF SOME MODELS THE INFLUENCE OF CLOUDS, WIND VELOCITY AND WIND DIRECTION IS PASSING INTO THEM FROM DETERMINISTIC POINT OF VIEW.","abstract_has_math":false,"creators":["Δούκας, Ιωάννης","Doukas, Ioannis"],"institution":"Aristotle University Of Thessaloniki (AUTH)","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1989,"date_issued":"1989","date_published":"1989","updated_at":"2026-07-24T02:24:43Z","subjects":["Ατμοσφαιρικά μοντέλα","Γεωδαισία","Διάθλαση","ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΕΣ ΜΕΤΡΗΣΗΣ ΑΠΟΣΤΑΣΕΩΝ","Μικροκύματα","Μοντέλα παλινδρόμησης","Atmospheric models","ELECTROMAGNETIC DISTANCE MEASUREMENTS","Geodesy","Microwaves","Refraction","Regression models","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Πολιτικού Μηχανικού","Engineering and Technology","Civil Engineering"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1042"],"render_values":[{"text":"10.12681/eadd/1042","href":"https://doi.org/10.12681/eadd/1042","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/1042","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Δούκας, Ιωάννης","Doukas, Ioannis"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1989"]},{"key":"dc:publisher","label":"Institution","values":["Aristotle University Of Thessaloniki (AUTH)","Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Ατμοσφαιρικά μοντέλα","Γεωδαισία","Διάθλαση","ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΕΣ ΜΕΤΡΗΣΗΣ ΑΠΟΣΤΑΣΕΩΝ","Μικροκύματα","Μοντέλα παλινδρόμησης","Atmospheric models","ELECTROMAGNETIC DISTANCE MEASUREMENTS","Geodesy","Microwaves","Refraction","Regression models","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Πολιτικού Μηχανικού","Engineering and Technology","Civil Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/1042","http://hdl.handle.net/10442/hedi/1042"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["USING A SAMPLE OF 2360 MICROWAVE DISTANCE MEASUREMENTS AND RELATED METEOROLOGICAL MEASUREMENTS (PRESSURE, TEMPERATURE AND HUMIDITY), A STUDY WAS CARRIED OUT AIMING TO IMPROVE THE EOM ACCURACY. THE BASIC TOOL IS MULTIPLE LINEAR REGRESSION(STEPWISE METHOD) AND SEVERAL MODELS WERE EXAMINED. THE STANDARD INDEPENDENT VARIABLES OF THESE MODELS WERE THE ABOVE MENTIONED METEOROLOGICAL VARIABLES AND THE DISTANCE (GIVEN BY THE EOM INSTRUMENT). THE DEPENDENT VARIABLE WAS THE VARIATION OF REDUCED DUE REFRACTIVE INDEX DISTANCE MEASUREMENTS. THE DERIVED MODELSDO SHOW REMARKABLE ACCURACY, STABILITY AND PREDICTION CAPABILITIES. THE USE OFQUALITATIVE VARIABLES IMPROVE THE MODEL STRENGTHS RECOVERING IMPORTANT INFORMATION ABOUT TIME AND POSITION. ALSO WITH THE HELP OF SOME MODELS THE INFLUENCE OF CLOUDS, WIND VELOCITY AND WIND DIRECTION IS PASSING INTO THEM FROM DETERMINISTIC POINT OF VIEW.","ΜΕ ΒΑΣΗ ΔΙΑΘΕΣΙΜΕΣ ΠΑΡΑΤΗΡΗΣΕΙΣ ΑΠΟΣΤΑΣΕΩΝ ΚΑΙ ΜΕΤΕΩΡΟΛΟΓΙΚΩΝ ΔΕΔΟΜΕΝΩΝ (2360 ΜΕΤΡΗΣΕΙΣ ΑΠΟΣΤΑΣΕΩΝ) ΕΞΕΤΑΖΕΤΑΙ Η ΔΥΝΑΤΟΤΗΤΑ ΒΕΛΤΙΩΣΗΣ ΤΗΣ ΑΚΡΙΒΕΙΑΣ ΤΩΝ ΑΝΗΓΜΕΝΩΝ ΛΟΓΩ Δ.Δ. ΤΙΜΩΝ ΜΙΚΡΟΚΥΜΑΤΙΚΩΝ ΟΡΓΑΝΩΝ. ΑΝΑΠΤΥΣΣΟΝΤΑΙ ΑΠΛΑ ΓΡΑΜΜΙΚΑ ΜΟΝΤΕΛΑΠΑΛΙΝΔΡΟΜΗΣΗΣ ΤΑ ΟΠΟΙΑ ΠΕΡΙΕΧΟΥΝ ΩΣ ΑΝΕΞΑΡΤΗΤΕΣ ΜΕΤΑΒΛΗΤΕΣ ΤΙΣ ΜΕΤΕΩΡΟΛΟΓΙΚΕΣ ΠΙΕΣΗ, ΘΕΡΜΟΚΡΑΣΙΑ ΚΑΙ ΥΓΡΑΣΙΑ. ΜΕ ΤΗ ΣΥΜΜΕΤΟΧΗ ΣΕ ΑΥΤΕΣ ΚΑΙ ΤΗΣ ΤΙΜΗΣ ΤΟΥ ΟΡΓΑΝΟΥ ΕΟΜ, ΔΙΑΠΙΣΤΩΝΕΤΑΙ ΔΙΑΧΡΟΝΙΚΗ ΕΥΣΤΑΘΕΙΑ ΤΩΝ ΜΟΝΤΕΛΩΝ. Η ΣΥΜΜΕΤΟΧΗ ΠΟΙΟΤΙΚΩΝΜΕΤΑΒΛΗΤΩΝ ΠΟΥ ΣΧΕΤΙΖΟΝΤΑΙ ΜΕ ΤΟΝ ΤΟΠΟ ΚΑΙ ΤΟ ΧΡΟΝΟ, ΕΞΑΛΕΙΦΕΙ ΤΙΣ ΣΥΣΤΗΜΑΤΙΚΕΣ ΔΙΑΦΟΡΕΣ ΓΡΑΜΜΙΚΗΣ ΦΥΣΗΣ ΜΕΤΑΞΥ ΤΩΝ 6 ΔΙΑΘΕΣΙΜΩΝ ΠΕΡΙΟΔΩΝ ΜΕΤΡΗΣΕΩΝ. ΑΠΟΚΑΛΥΠΤΟΝΤΑΙ ΔΕ ΠΛΗΡΟΦΟΡΙΕΣ ΣΧΕΤΙΚΑ ΜΕ ΤΗ ΝΕΦΟΚΑΛΥΨΗ, ΤΗΝ ΤΑΧΥΤΗΤΑ ΚΑΙ ΤΗ ΔΙΕΥΘΥΝΣΗ ΑΝΕΜΟΥ. ΤΑ ΜΟΝΤΕΛΑ ΑΠΟΔΕΙΚΝΥΟΝΤΑΙ ΣΤΑΤΙΣΤΙΚΑ ΟΤΙ ΕΧΟΥΝ ΕΞΑΙΡΕΤΙΚΑ ΚΑΛΕΣ ΔΥΝΑΤΟΤΗΤΕΣ ΠΡΟΓΝΩΣΗΣ."]},{"key":"dc:title","label":"Title","values":["ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΑΚΡΙΒΕΙΑΣ ΤΩΝ ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΩΝ ΜΕΤΡΗΣΕΩΝ ΑΠΟΣΤΑΣΕΩΝ ΜΕ ΤΗ ΒΟΗΘΕΙΑ ΣΤΑΤΙΣΤΙΚΩΝ ΜΕΘΟΔΩΝ","CONTRIBUTION TO THE STUDY OF THE ACHIEVED ACCURACY FROM E.D.M. MEASUREMENTS WITH THE HELP OF STATISTICAL METHODS"]}]}],"canonical_facts":{"dc:creator":["Δούκας, Ιωάννης","Doukas, Ioannis"],"dc:date":["1989"],"dc:description":["USING A SAMPLE OF 2360 MICROWAVE DISTANCE MEASUREMENTS AND RELATED METEOROLOGICAL MEASUREMENTS (PRESSURE, TEMPERATURE AND HUMIDITY), A STUDY WAS CARRIED OUT AIMING TO IMPROVE THE EOM ACCURACY. THE BASIC TOOL IS MULTIPLE LINEAR REGRESSION(STEPWISE METHOD) AND SEVERAL MODELS WERE EXAMINED. THE STANDARD INDEPENDENT VARIABLES OF THESE MODELS WERE THE ABOVE MENTIONED METEOROLOGICAL VARIABLES AND THE DISTANCE (GIVEN BY THE EOM INSTRUMENT). THE DEPENDENT VARIABLE WAS THE VARIATION OF REDUCED DUE REFRACTIVE INDEX DISTANCE MEASUREMENTS. THE DERIVED MODELSDO SHOW REMARKABLE ACCURACY, STABILITY AND PREDICTION CAPABILITIES. THE USE OFQUALITATIVE VARIABLES IMPROVE THE MODEL STRENGTHS RECOVERING IMPORTANT INFORMATION ABOUT TIME AND POSITION. ALSO WITH THE HELP OF SOME MODELS THE INFLUENCE OF CLOUDS, WIND VELOCITY AND WIND DIRECTION IS PASSING INTO THEM FROM DETERMINISTIC POINT OF VIEW.","ΜΕ ΒΑΣΗ ΔΙΑΘΕΣΙΜΕΣ ΠΑΡΑΤΗΡΗΣΕΙΣ ΑΠΟΣΤΑΣΕΩΝ ΚΑΙ ΜΕΤΕΩΡΟΛΟΓΙΚΩΝ ΔΕΔΟΜΕΝΩΝ (2360 ΜΕΤΡΗΣΕΙΣ ΑΠΟΣΤΑΣΕΩΝ) ΕΞΕΤΑΖΕΤΑΙ Η ΔΥΝΑΤΟΤΗΤΑ ΒΕΛΤΙΩΣΗΣ ΤΗΣ ΑΚΡΙΒΕΙΑΣ ΤΩΝ ΑΝΗΓΜΕΝΩΝ ΛΟΓΩ Δ.Δ. ΤΙΜΩΝ ΜΙΚΡΟΚΥΜΑΤΙΚΩΝ ΟΡΓΑΝΩΝ. ΑΝΑΠΤΥΣΣΟΝΤΑΙ ΑΠΛΑ ΓΡΑΜΜΙΚΑ ΜΟΝΤΕΛΑΠΑΛΙΝΔΡΟΜΗΣΗΣ ΤΑ ΟΠΟΙΑ ΠΕΡΙΕΧΟΥΝ ΩΣ ΑΝΕΞΑΡΤΗΤΕΣ ΜΕΤΑΒΛΗΤΕΣ ΤΙΣ ΜΕΤΕΩΡΟΛΟΓΙΚΕΣ ΠΙΕΣΗ, ΘΕΡΜΟΚΡΑΣΙΑ ΚΑΙ ΥΓΡΑΣΙΑ. ΜΕ ΤΗ ΣΥΜΜΕΤΟΧΗ ΣΕ ΑΥΤΕΣ ΚΑΙ ΤΗΣ ΤΙΜΗΣ ΤΟΥ ΟΡΓΑΝΟΥ ΕΟΜ, ΔΙΑΠΙΣΤΩΝΕΤΑΙ ΔΙΑΧΡΟΝΙΚΗ ΕΥΣΤΑΘΕΙΑ ΤΩΝ ΜΟΝΤΕΛΩΝ. Η ΣΥΜΜΕΤΟΧΗ ΠΟΙΟΤΙΚΩΝΜΕΤΑΒΛΗΤΩΝ ΠΟΥ ΣΧΕΤΙΖΟΝΤΑΙ ΜΕ ΤΟΝ ΤΟΠΟ ΚΑΙ ΤΟ ΧΡΟΝΟ, ΕΞΑΛΕΙΦΕΙ ΤΙΣ ΣΥΣΤΗΜΑΤΙΚΕΣ ΔΙΑΦΟΡΕΣ ΓΡΑΜΜΙΚΗΣ ΦΥΣΗΣ ΜΕΤΑΞΥ ΤΩΝ 6 ΔΙΑΘΕΣΙΜΩΝ ΠΕΡΙΟΔΩΝ ΜΕΤΡΗΣΕΩΝ. ΑΠΟΚΑΛΥΠΤΟΝΤΑΙ ΔΕ ΠΛΗΡΟΦΟΡΙΕΣ ΣΧΕΤΙΚΑ ΜΕ ΤΗ ΝΕΦΟΚΑΛΥΨΗ, ΤΗΝ ΤΑΧΥΤΗΤΑ ΚΑΙ ΤΗ ΔΙΕΥΘΥΝΣΗ ΑΝΕΜΟΥ. ΤΑ ΜΟΝΤΕΛΑ ΑΠΟΔΕΙΚΝΥΟΝΤΑΙ ΣΤΑΤΙΣΤΙΚΑ ΟΤΙ ΕΧΟΥΝ ΕΞΑΙΡΕΤΙΚΑ ΚΑΛΕΣ ΔΥΝΑΤΟΤΗΤΕΣ ΠΡΟΓΝΩΣΗΣ."],"dc:identifier":["10.12681/eadd/1042","http://hdl.handle.net/10442/hedi/1042"],"dc:language":["gre"],"dc:publisher":["Aristotle University Of Thessaloniki (AUTH)","Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)"],"dc:subject":["Ατμοσφαιρικά μοντέλα","Γεωδαισία","Διάθλαση","ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΕΣ ΜΕΤΡΗΣΗΣ ΑΠΟΣΤΑΣΕΩΝ","Μικροκύματα","Μοντέλα παλινδρόμησης","Atmospheric models","ELECTROMAGNETIC DISTANCE MEASUREMENTS","Geodesy","Microwaves","Refraction","Regression models","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Πολιτικού Μηχανικού","Engineering and Technology","Civil Engineering"],"dc:title":["ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΑΚΡΙΒΕΙΑΣ ΤΩΝ ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΩΝ ΜΕΤΡΗΣΕΩΝ ΑΠΟΣΤΑΣΕΩΝ ΜΕ ΤΗ ΒΟΗΘΕΙΑ ΣΤΑΤΙΣΤΙΚΩΝ ΜΕΘΟΔΩΝ","CONTRIBUTION TO THE STUDY OF THE ACHIEVED ACCURACY FROM E.D.M. MEASUREMENTS WITH THE HELP OF STATISTICAL METHODS"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:24:43Z"}