The Real-Time Service Product: Conquering Customer Time and Space

Abstract On April 1, 2013 IGS launched the real-time service providing products for Precise Point Positioning (PPP). The availability of real-time makes PPP a very powerful technique to process GNSS signals in real-time and opens a new PPP applications opportunities. There are still, however, some limitations of PPP, especially in the kinematic mode. A significant change in satellite geometry is required to efficiently de-correlate troposphere delay, receiver clock offset, and receiver height. In order to challenge PPP limitations, the GNSS-WARP (Wroclaw Algorithms for Real-time Positioning) software has been developed from scratch at Wroclaw University of Environmental and Life Science in Poland. This paper presents the GNSS-WARP software itself and some results of GNSS data analysis using PPP and PPP-RTK (Real-Time Kinematic) technique. The results of static and kinematic processing in GPS only and GPS + GLONASS mode with final and real-time products are presented. Software performance validation in postprocessing mode confirmed that the software can be considered as a state-ofthe- art software and used for further studies on PPP algorithm development. The real-time positioning test made it possible to assess the quality of real-time coordinates, which is a few millimeters for North, East, Up in static mode, a below decimeter in kinematic mode. The accuracy and precision of height estimates in kinematic mode were improved by constraining the solution with an external, near real-time troposphere model. The software also allows estimation of real-time ZTD, however, the obtained precision of 11.2 mm means that further improvements in the software, real-time products or processing strategy are required.

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Design the Information System of the Locating and Tracking Harbor Tug Based on the Web

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.468-471.816 ◽

2012 ◽

Vol 468-471 ◽

pp. 816-820

Author(s):

Ting Ting Cui ◽

Han Bin Xiao ◽

Jin Shan Dai

Keyword(s):

Information System ◽

Radio Frequency ◽

Real Time ◽

Time And Space ◽

Operating Condition ◽

The Real ◽

Time Property ◽

The Web

In order to manage the tug better, efficiently and securely dispatch tug operation, and meet the real-time property, accuracy requirements, the GPS chip of embedding RFID for locating and tracking would be used. Through the wireless Radio Frequency technology and Ethernet, it can complete conveying information between tug and harbor dispatching room, then structure the tug locating and tracking information system. It can real-timely acquire and monitor the tug parameter of position, desired track, operating condition and so on. According to that, it makes real-time dispatching. Efficiently achieve the management in harbor pass, operation and assignments all the time and space.

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INTEGRITY ANALYSIS OF REAL-TIME PPP TECHNIQUE WITH IGS-RTS SERVICE FOR MARITIME NAVIGATION

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-4-w5-61-2017 ◽

2017 ◽

Vol XLII-4/W5 ◽

pp. 61-66 ◽

Cited By ~ 2

Author(s):

M. El-Diasty

Keyword(s):

Real Time ◽

Convergence Time ◽

Time Service ◽

Positioning Systems ◽

The Real ◽

Gps Positioning ◽

Inland Waterway ◽

Maritime Navigation ◽

Positioning Technique ◽

Automatic Docking

Open sea and inland waterways are the most widely used mode for transporting goods worldwide. It is the International Maritime Organization (IMO) that defines the requirements for position fixing equipment for a worldwide radio-navigation system, in terms of accuracy, integrity, continuity, availability and coverage for the various phases of navigation. Satellite positioning systems can contribute to meet these requirements, as well as optimize marine transportation. Marine navigation usually consists of three major phases identified as Ocean/Coastal/Port approach/Inland waterway, in port navigation and automatic docking with alert limit ranges from 25&thinsp;m to 0.25&thinsp;m. GPS positioning is widely used for many applications and is currently recognized by IMO for a future maritime navigation. With the advancement in autonomous GPS positioning techniques such as Precise Point Positioning (PPP) and with the advent of new real-time GNSS correction services such as IGS-Real-Time-Service (RTS), it is necessary to investigate the integrity of the PPP-based positioning technique along with IGS-RTS service in terms of availability and reliability for safe navigation in maritime application. This paper monitors the integrity of an autonomous real-time PPP-based GPS positioning system using the IGS real-time service (RTS) for maritime applications that require minimum availability of integrity of 99.8&thinsp;% to fulfil the IMO integrity standards. To examine the integrity of the real-time IGS-RTS PPP-based technique for maritime applications, kinematic data from a dual frequency GPS receiver is collected onboard a vessel and investigated with the real-time IGS-RTS PPP-based GPS positioning technique. It is shown that the availability of integrity of the real-time IGS-RTS PPP-based GPS solution is 100&thinsp;% for all navigation phases and therefore fulfil the IMO integrity standards (99.8&thinsp;% availability) immediately (after 1 second), after 2 minutes and after 42 minutes of convergence time for Ocean/Coastal/Port approach/Inland waterway, in port navigation and automatic docking, respectively. Moreover, the misleading information is about 2&thinsp;% for all navigation phases that is considered less safe is not in immediate danger because the horizontal position error is less than the navigation alert limits.

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Design of Real-Time Dynamic Reversible Lane in Intelligent Cooperative Vehicle Infrastructure System

Journal of Advanced Transportation ◽

10.1155/2020/8838896 ◽

2020 ◽

Vol 2020 ◽

pp. 1-8

Author(s):

Lina Mao ◽

Wenquan Li ◽

Pengsen Hu ◽

Guiliang Zhou ◽

Huiting Zhang ◽

...

Keyword(s):

Real Time ◽

Service Level ◽

Traffic Information ◽

Control Effect ◽

Time Service ◽

Traffic Demand ◽

The Real ◽

Time Dynamic ◽

Lane Changes ◽

Infrastructure System

The rapidly growing traffic demand and the slowly increasing traffic supply have produced an mounting contradiction, which is mainly manifested in cities as road congestion and unbalanced bidirectional traffic flow. Most of the reversible lanes are implemented on fixed sections and fixed times and are mainly guided by ground markings, road signs, railings, and traffic police officer. It requires a lot of human and material costs. And, the control effect is lagging and inaccurate. Aiming at these problems, a real-time dynamic reversible lane scheme in the Intelligent Cooperative Vehicle Infrastructure System (CVIS) was proposed. Traffic information was collected in real time through the CVIS, and a reversible lane scheme was established based on the real-time service level V/C and BRP functions. A lane change control model was applied to determine the number of lanes and the timing of lane changes. Then, the reversible lanes were managed in real time through intelligent road stud lights and light curtain walls. Buffer sections and no-entry sections were set to ensure reversible lanes operating safely and efficiently. VISSIM simulation was used for case analysis, and the results showed that compared with the traditional time-controlled reversible lane scheme, the real-time dynamic reversible lane scheme could reduce the average vehicle delay by 27.4% and decrease the vehicle VOC, CO and NOX emissions by 13.5%.

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Developing narrative exhibitions and science centres. Training needs of exhibition designers

Journal of Science Communication ◽

10.22323/2.15040304 ◽

2016 ◽

Vol 15 (04) ◽

pp. C04

Author(s):

Peter Higgins

Keyword(s):

Social Media ◽

Real Time ◽

Science Communication ◽

Training Programme ◽

Training Needs ◽

Time And Space ◽

The Real ◽

Science Centres

In respect of the different modes of science communication including journalism, radio, online, I would propose that the process of making exhibitions and centres dedicated to science & technology is one of the hardest creative typologies. It also provides a very different type of engagement to other modes, in that it works in real time and space with real tangible objects and responsive media. The power of the real is also extended through the direct and collective involvement of people, providing a refreshing antidote to the potential alienating nature of social media and the ever-growing obsession with the virtual. In this paper I will discuss the skills required by a designer in order to solve the challenges contained within the client brief (the project document provided by the client), and therefore the skills a proper exhibition designer training programme should deliver.

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Real-time delay statistics in wireless IP networks

Advances in Radio Science ◽

10.5194/ars-10-105-2012 ◽

2012 ◽

Vol 10 ◽

pp. 105-111 ◽

Cited By ~ 1

Author(s):

D. Huo

Keyword(s):

Real Time ◽

Ip Networks ◽

Transmission Delay ◽

Time Service ◽

The Real ◽

The Public ◽

Delay Jitter ◽

Sample Data ◽

Wireless Ip ◽

Time Evaluation

Abstract. In the wireless communication, the variation of the transmission delay is called jitter and is one of the variables responsible for the degradation of the service quality. Jitter is present in every section of the transmission system. Its stochastic behavior depends on the technology implemented in the system and the service provided by the system. This paper focuses on mathematical modeling and phenomenological analysis of the jitter encountered by the real-time services in a wireless network. Using the data made available to the public by the wireless industry, we explore the stochastic characterizations of the jitter in a wireless IP networks. Within the scope of real-time service, we studied the relation between delay, jitter and the inter-packet time. Evaluation of the sample data indicates a long range dependence of the inter-packet time of the received packets in a real-time connection. The result helps understanding the transmission delay encountered by the real-time service over wireless IP networks.

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Revamping the GFZ Energy Magnitude computation procedure to establish a new service

10.5194/egusphere-egu2020-17790 ◽

2020 ◽

Cited By ~ 1

Author(s):

Angelo Strollo ◽

Domenico Di Giacomo ◽

Dino Bindi ◽

Riccardo Zaccarelli

Keyword(s):

Real Time ◽

Seismic Moment ◽

Rapid Determination ◽

Moment Magnitude ◽

Time Data ◽

Data Set ◽

Time Service ◽

The Real ◽

Seismic Waveform ◽

Earthquake Size

Location and magnitude are the primary information released by any seismological observatory to characterize an earthquake. Nowadays, the size of large enough earthquakes are routinely measured in terms of released seismic moment (moment magnitude, Mw). Whereas events with Mw above about 5.5 populate seismological archives connected to global monitoring networks, the moment magnitude of smaller events require the analysis of regional and local dense networks, or the establishment of empirical relationships to convert other magnitude scales into Mw (e.g., local magnitude to moment magnitude conversions). Since Mw is constructed over a physical parameter, it does not saturate. Moreover, being the seismic moment connected to tectonic features such as fault area and the average slip, Mw became the reference magnitude for seismic hazard studies. Although Mw accomplishes perfectly the task of characterizing the earthquake size, it does not provide the most complete view about the earthquake strength since Mw is insensitive to changes in the rupture dynamics. An assessment of the amount of the seismic energy released by an event (energy magnitude Me) is allowing to complement Mw with a measure of the earthquake size more suitable to evaluate the earthquake shaking potential.Aiming at introducing soon a new real-time service providing Me for major earthquakes we are presenting in this study the results of benchmark tests against the procedure proposed by Di Giacomo et al., in 2008 [1] as well as the analysis performed on a larger data set including all major events available in the GEOFON catalogue with a published moment magnitude since 2011. The initial procedure has been translated to a python code within the Stream2segment package [2] and leveraging on EIDA and IRIS data services, more than 2000 station for ~5000 events since 2011 have been downloaded and processed. The large data set used and the real-time application pose new challenges, among them the teleseismic distance, the strongly unbalanced network and the real-time data flow making the data set used dynamic. We present and discuss here the effects of these complications and how we are tackling them towards the implementation of new service at GFZ computing Me in real-time.&#160;[1] Di Giacomo, D., Grosser, H., Parolai, S., Bormann, P., and Wang, R. (2008), Rapid determination of Me for strong to great shallow earthquakes, Geophys. Res. Lett., 35, L10308, doi:10.1029/2008GL033505.[2] Riccardo Zaccarelli, Dino Bindi, Angelo Strollo, Javier Quinteros, Fabrice Cotton; Stream2segment: An Open&#8208;Source Tool for Downloading, Processing, and Visualizing Massive Event&#8208;Based Seismic Waveform Datasets. Seismological Research Letters ; 90 (5): 2028&#8211;2038. doi: https://doi.org/10.1785/0220180314

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An Enhanced Real-Time Regional Ionospheric Model Using IGS Real-Time Service (IGS-RTS) Products

Journal of Navigation ◽

10.1017/s0373463315000740 ◽

2015 ◽

Vol 69 (3) ◽

pp. 521-530 ◽

Cited By ~ 6

Author(s):

Mohamed Abdelazeem ◽

Rahmi N. Çelik ◽

Ahmed El-Rabbany

Keyword(s):

Real Time ◽

Convergence Time ◽

Single Frequency ◽

High Solar Activity ◽

Satellite Orbits ◽

Electron Content ◽

Ionospheric Model ◽

Time Service ◽

The Real ◽

Regional Ionospheric Model

Recently, the International Global Navigation Satellite System (GNSS) Service (IGS) has launched the Real-Time Service (IGS-RTS). The RTS products enable real-time precise positioning applications. For single-frequency Real-Time Precise Point Positioning (RT-PPP), ionospheric delay mitigation is a major challenge. To overcome this challenge, we developed a Real-Time Regional Ionospheric Model (RT-RIM) over Europe using the RTS satellite orbits and clock products. The model has spatial and temporal resolution of 1° × 1° and 15 minutes, respectively. Global Positioning System (GPS) observations from 60 IGS and EUREF reference stations are processed using the Bernese 5·2 PPP module in order to extract the Real-Time Vertical Electron Content (RT-VTEC). The PPP convergence time and positioning accuracy using the RTS products is estimated and compared with dual frequency PPP and single-frequency PPP obtained through the combined rapid IGS Global Ionospheric Maps (IGS-GIM) over three consecutive days under high solar activity and one of them under active geomagnetic activity. The results show that the proposed model improves PPP accuracy and convergence time under the mid-latitude region about 40%, 55% and 40% for the horizontal, height and three-dimensional (3D) components respectively in comparison with the IGS-GIM.

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If the Subaltern Speaks in the Woods and Nobody's Listening, Does He Make a Sound?

Slavic Review ◽

10.2307/27652768 ◽

2008 ◽

Vol 67 (1) ◽

pp. 81-83

Author(s):

Paula A. Michaels

Keyword(s):

Real Time ◽

Power Relations ◽

Level Playing Field ◽

Time And Space ◽

The Real ◽

Playing Field ◽

Real Place ◽

Present Collection ◽

Real People ◽

The Relationship

As the present collection of articles makes clear, there is no shortage of interpretations of or reactions to Borat: Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan. While nothing drains the laughter out of a joke faster than academic analysis, these articles succeed in raising differing, thought-provoking perspectives on the meaning and significance of one of the biggest cultural phenomena of 2006. And although their methodological and analytical perspectives diverge, these articles share at least one trait in common. Each author faces grappling with the relationship between the Kazakhstan of Sacha Baron Cohen's imagination and, dare I say, the “real Kazakhstan,” a real place inhabited by real people, existing in real time and space. I do not dispute the subjectivity of that reality, but the acceptance of the premise that Kazakhstan and Kazakhstanis in fact exist is essential to my argument, which seeks not to place the country and its people on a level playing field with their hyperreal corollary, but to underscore the power relations that come into play when eroding or rendering insignificant the line between them.

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