scholarly journals PERMANENT GNSS MONITORING OF LANDSLIDE UMKA

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Mileva Samardžić-Petrović ◽  
Jovan Popović ◽  
Uroš Đurić ◽  
Biljana Abolmasov ◽  
Marko Pejić ◽  
...  
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Unmanned Aerial Vehicle ◽  
Satellite System ◽  
Navigation Satellite ◽  
Kinematic Positioning ◽  
Landslide Activity ◽  
Aerial Vehicle

The Umka landslide is one of the biggest inhabited active landslides in Serbia. The Umka landslideactivity has been monitored for a period longer than 85 years, by various geotechnical and geodetictechniques. Since 2010, landslide activity has been continuously monitored by automated permanentGlobal Navigation Satellite System (GNSS) based monitoring system in real time. Furthermore,since 2018 landslide activity has been monitored by GNSS kinematic positioning of a set ofcharacteristic points as well as by UAV (Unmanned Aerial Vehicle) photogrammetry. The mainissue of this paper is the presentation of the results gained with GNSS kinematic positioning ofcharacteristic points of Umka landslide within three observation epochs.

scholarly journals Nghiên cứu chế độ bay UAV trong khảo sát địa hình công trình dạng tuyến - ứng dụng cho đoạn đường đê Xuân Quan, Hà Nội

2021 ◽  
Vol 15 (7V) ◽  
pp. 131-142
Author(s):  
Lương Ngọc Dũng ◽  
Trần Đình Trọng ◽  
Vũ Đình Chiều ◽  
Bùi Duy Quỳnh ◽  
Hà Thị Hằng ◽  
...  
Keyword(s):  
Real Time ◽  
Unmanned Aerial Vehicle ◽  
Global Navigation Satellite System ◽  
Satellite System ◽  
Viet Nam ◽  
Navigation Satellite ◽  
Real Time Kinematic ◽  
Aerial Vehicle ◽  
Global Navigation ◽  
Global Navigation Satellite

Giải pháp thành lập bản đồ địa hình bằng thiết bị bay không người lái (Unmanned Aerial Vehicle - UAV) đang ngày càng phổ biến ở Việt Nam. Đã có nhiều nghiên cứu chứng minh thiết bị UAV đảm bảo độ chính xác thành lập bản đồ địa hình tỷ lệ lớn, tuy nhiên chưa có các giải pháp cụ thể cho công trình đặc thù dạng tuyến. Mục tiêu nghiên cứu của bài báo là các chế độ bay phù hợp cho công tác khảo sát địa hình các công trình dạng tuyến. Đối tượng thực nghiệm, một đoạn đường bộ thuộc địa phận đê Xuân Quan, Hà Nội, được khảo sát bằng thiết bị UAV Phantom 4 Pro với các chế độ khác nhau trên các phần mềm điều khiển bay có sẵn. Kết quả thực nghiệm các chế độ bay được so sánh với kết quả đo định vị động thời gian thực (Global Navigation Satellite System/Real Time Kinematic - GNSS/RTK) để đánh giá độ chính xác. Nghiên cứu chỉ ra kiểu bay dải phủ trùm, đối với công trình dạng tuyến, thích hợp ở các giai đoạn thiết kế kỹ thuật và thiết kế thi công. Trong khi kiểu bay 2 dải đơn phù hợp và hiệu quả cho các quá trình quy hoạch, đánh giá sơ bộ công trình dạng tuyến.

KONTRIBUSI GLOBAL NAVIGATION SATELLITE SYSTEM PADA PENENTUAN TITIK KONTROL UDARA DI METODE FOTOGRAMETRI UNMANNED AERIAL VEHICLE UNTUK PEMETAAN SKALA BESAR DI INDONESIA

2021 ◽  
pp. 867
Author(s):  
Irwan Gumilar ◽  
Deni Suwardhi ◽  
Irfan Budaya ◽  
Brian Bramanto ◽  
Kamal Nur Fauzan
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Global Navigation Satellite System ◽  
Satellite System ◽  
Navigation Satellite ◽  
Mean Square ◽  
Post Processing ◽  
Check Points ◽  
Aerial Vehicle ◽  
Global Navigation ◽  
Global Navigation Satellite

Indonesia saat ini sedang melakukan pemetaan skala besar secara masif. Salah satu metode yang digunakan pada pemetaan skala besar tersebut adalah dengan menggunakan teknik fotogrametri berbasiskan Unmanned Aerial Vehicle (UAV). Saat ini, metode penentuan titik kontrol udara dengan menggunakan Global Navigation Satellite System (GNSS) banyak dilakukan untuk memimalisir jumlah titik kontrol tanah tanpa mengurangi kualitas dari produk fotogrameteri yang dihasilkan. Penelitian ini bertujuan untuk menganalisa kontribusi sistem GNSS pada penentuan titik kontrol udara untuk metode fotogrametri berbasiskan UAV. Pengukuran GNSS frekuensi ganda pada sistem UAV di wilayah Jatinangor, Bandung dan Panglipuran Bali digunakan pada penelitian ini. Panjang baseline antara titik kontrol dan rover berkisar antara 350 hingga 900 m. Penentuan posisi titik kontrol udara berbasiskan GNSS menggunakan metode Post Processing Kinematic (PPK) dengan teknik pemecahan ambiguitas fase LAMBDA Fix and Hold. Pengolahan data GNSS dilakukan dengan menggunakan beberapa kombinasi frekuensi dan sistem GNSS. Evaluasi ketelitian hasil perataan berkas menggunakan titik kontrol udara pada setiap kombinasi frekuensi dan sistem GNSS dilakukan dengan memperhatikan nilai Root Mean Square Error (RMSE) pada 20 titik cek tanah atau Independent Check Points (ICP). Berdasarkan hasil tersebut, kombinasi gelombang L1 dan L2 menggunakan sistem GPS dan BeiDou idealnya digunakan untuk pemetaan skala besar menggunakan fotogrametri UAV. Selain itu, kombinasi data GPS dan Beidou frekuensi ganda memiliki tingkat ketelitian titik kontrol udara yang terbaik dibandingkan kombinasi yang lainnya. Selain itu, kombinasi GPS dan BeiDou menggunakan hanya gelombang L1 memiliki tingkat ketelitian yang sama dibandingkan dengan GPS menggunakan gelombang L1 dan L2.

scholarly journals A Sustainable Approach to Geomatic Methods in Ravine Monitoring and Associated Natural Disaster Prevention

2021 ◽  
Author(s):  
Sanda Naș ◽  
Oana Manuela Ciurean ◽  
Mircea V. Bondrea ◽  
Virgil Mihai Radulescu
Keyword(s):  
Natural Disaster ◽  
Unmanned Aerial Vehicle ◽  
Global Navigation Satellite System ◽  
Satellite System ◽  
Navigation Satellite ◽  
Disaster Prevention ◽  
Non Invasive ◽  
Aerial Vehicle ◽  
Global Navigation Satellite ◽  
Life On Earth

This paper presents the monitoring of an extremely eroding phenomenon (ravine) near Ciurila, Cluj County, Romania, using UAV (Unmanned Aerial Vehicle) and GNSS (Global Navigation Satellite System) technologies, taking into account the objectives of SDG 15 of the UN resolution, which refers to life on earth. In this sense, the results of a monitoring through sustainable and non-invasive technologies are presented, follo-wing three cycles of observations, carried out between June 2019 and April 2021.The paper aims to present the advantages and limitations of such a study , as well as the importance of monitoring erosion phenomena (in this case, ravines) for the ecosystem, but also for the nearby inhabitants. Software and technologies are used that allow the automatic calculation of the volume of the ravine and the displacements between the different measurement cycles, which allows obtaining objective conclusions and pro-posing further measures.

scholarly journals SPACE-AIR-GROUND CO-OBSERVATION IN WATERSHED MANAGEMENT: THE ESTABLISHMENT OF SYSTEM

2018 ◽  
Vol XLII-3 ◽  
pp. 2465-2468 ◽  
Author(s):  
L. Zhong ◽  
J. Yu ◽  
X. Tang ◽  
S. Pan
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Unmanned Aerial Vehicle ◽  
Watershed Management ◽  
Information Acquisition ◽  
Dynamic Monitoring ◽  
Aerial Vehicle ◽  
Low Altitude ◽  
Water Administration

To realize real-time, detailed, and standardized watershed monitoring and management, a dynamic monitoring system is proposed, at all levels (space, air, and ground), by comprehensively utilizing advanced satellite and low-altitude unmanned aerial vehicle (UAV) technologies The system can be used to monitor and manage all kinds of sensitive water targets. This study takes water administration enforcement as an example for proving it feasibility by selecting typical study areas. This study shows that the proposed system is a promising information acquisition means, contributing to the development of watershed management.

scholarly journals Mapping site-level microtopography with Real- Time Kinematic Global Navigation Satellite Systems (RTK GNSS) and Unmanned Aerial Vehicle Photogrammetry (UAVP)

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Christopher H. Roosevelt
Keyword(s):  
Data Quality ◽  
Real Time ◽  
Unmanned Aerial Vehicle ◽  
Navigation Satellite ◽  
Archaeological Survey ◽  
Western Turkey ◽  
Real Time Kinematic ◽  
Aerial Vehicle ◽  
Global Navigation ◽  
Global Navigation Satellite

AbstractMicrotopographic mapping has a long history in archaeology and has gained prominence recently owing to the proliferation of digital technologies. With such proliferation, it becomes necessary to compare and contrast different approaches based on a common set of criteria. This article compares the implementation and efficiency of two methods of mapping microtopography – ground-based Real-Time Kinematic Global Navigation Satellite System (RTK GNSS) and Unmanned Aerial Vehicle Photogrammetry (UAVP) survey – assessing the pros and cons of each, including those related to data quality. ‘Off-the-shelf’ solutions for methods were used to create the comparative dataset of microtopographic maps of six Middle and Late Bronze Age sites over the course of four seasons between 2007 and 2013 in the study area of the Central Lydia Archaeological Survey in western Turkey. Comparison of results demonstrate that the methods are similar with respect to ease of implementation, cost efficiency, and the (in)significance of data defects, while, unsurprisingly, UAVP survey can be greater than one order of magnitude more labor efficient than RTK GNSS survey and over two orders of magnitude more detailed as measured by data density. The accuracy of both methods is high, within typical error budgets for site-level mapping, and comparable to other recent digital mapping approaches. Accordingly, the results suggest that, given site suitability, UAVP is the more labor and cost-efficient method in the long run, with significant data quality benefits.

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