IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-23 DOI: 10.1007/s12647-026-00895-5

Dinesh Kumar Aswal

{"title":"From Measurement to Mitigation: A Metrology-Anchored Framework for Managing Delhi’s Air Pollution","authors":"Dinesh Kumar Aswal","doi":"10.1007/s12647-026-00895-5","DOIUrl":"10.1007/s12647-026-00895-5","url":null,"abstract":"<div><p>Delhi’s air pollution remains a persistent atmospheric and public-health challenge, driven by diverse emission sources, extensive secondary aerosol formation, and unfavourable meteorological conditions of the Indo-Gangetic basin. A fundamental limitation in effective air-quality governance has been the absence of a nationally harmonised measurement ecosystem that ensures metrological traceability, quantified uncertainty, and long-term comparability of air-quality data across monitoring networks. This paper places environmental metrology at the centre of air-pollution management and adopts the Aswal Model as an organising scientific framework that explicitly links measurement capability, diagnostic understanding, and accountable mitigation. The framework is operationalised through the India Certification Scheme for Environmental Monitoring Instruments (NPLI-CS) of CSIR–National Physical Laboratory, which embeds traceability, performance verification, and uncertainty evaluation into both continuous emission and ambient air-quality monitoring systems. Building on this metrological foundation, the paper presents a measurement-anchored diagnosis of Delhi’s pollution sources, encompassing combustion emissions, mechanically generated and re-suspended dust, construction activities, open waste and agricultural residue burning, and secondary aerosol chemistry. These diagnostics are translated into Scientific Remediation Measures (SRMs) formulated as testable interventions whose effectiveness can be quantitatively evaluated using certified measurement systems, consistent with the Aswal Model’s emphasis on evidence-based governance. The analysis demonstrates that sustained improvement in Delhi’s air quality requires a metrology-anchored pathway in which measurement credibility, scientific diagnosis, and mitigation outcomes remain continuously aligned through a feedback-driven governance framework.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 2","pages":"471 - 484"},"PeriodicalIF":1.3,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of an Improved Method for Milk Quality Assessment Using Hybrid Capacitive Sensor and Broadband Dielectric Spectroscopy 一种基于电容式传感器和宽带介电光谱的牛奶品质评价改进方法的设计

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-21 DOI: 10.1007/s12647-026-00888-4

Divya Palakaluri, Praveen Maurya

{"title":"Design of an Improved Method for Milk Quality Assessment Using Hybrid Capacitive Sensor and Broadband Dielectric Spectroscopy","authors":"Divya Palakaluri, Praveen Maurya","doi":"10.1007/s12647-026-00888-4","DOIUrl":"10.1007/s12647-026-00888-4","url":null,"abstract":"<div><p>Ensuring quality milk is of utmost importance to the public health sector and the dairy industry at large, but the prevailing methods for detecting contamination—chemical analysis and chromatography—are time-consuming, expensive, and impractical for use in real-time monitoring. These often fail to give comprehensive detection of multiple contaminants, including urea, moisture content, and other adulterants, due to their reliance on isolated measurements. This work introduces a novel multi-methodology framework for precise and real-time measurement of milk quality using a fringing-field interdigital capacitive sensor. The hybrid sensor design employed by this work uses a multi-layer architecture with nested electrode arrays to allow selective sensing of contaminants by adjusting electric field penetration depths. This design guarantees high sensitivity to urea at 0.01% w/v, resolution ± 0.005%, and to moisture at accuracy ± 0.1%. This framework uses broadband dielectric spectroscopy for the extraction of the dispersion signatures of impurities within a large frequency range for multi-component analysis with a 95% accuracy rate. This is enhanced through integration with machine learning using convolutional neural networks (CNNs) on the converted 2D heatmaps of the dielectric spectra, and yields a 98% classification accuracy. Moreover, inline monitoring microfluidics is dynamic real-time sensing in a production line, having a resolution of the time instance set for 1 s for measurement. Furthermore, the use of surface-engineered sensor coatings improves the specificity and sensitivity of targeted adsorption mechanisms. Therefore, this proposed model gives the high precision real-time milk quality estimation solution scalable and cost-effective for different operations. This would revolutionize contamination monitoring and ensure that consumers are protected while fulfilling regulatory requirements by improving efficiency in dairy operations.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 2","pages":"455 - 469"},"PeriodicalIF":1.3,"publicationDate":"2026-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Online Calibration of Transformer Angle Difference in Power Metering Energy Meters Based on FFT Algorithm and Phase Compensation Technology 基于FFT算法和相位补偿技术的电力计量电能表变压器角差在线标定

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-19 DOI: 10.1007/s12647-025-00879-x

Xian Xue, Jiwei Zhang, Jiaying Chen, Zhenzhao Yu, Huiqun Lin, Zuquan Zhuo

{"title":"Online Calibration of Transformer Angle Difference in Power Metering Energy Meters Based on FFT Algorithm and Phase Compensation Technology","authors":"Xian Xue, Jiwei Zhang, Jiaying Chen, Zhenzhao Yu, Huiqun Lin, Zuquan Zhuo","doi":"10.1007/s12647-025-00879-x","DOIUrl":"10.1007/s12647-025-00879-x","url":null,"abstract":"<div><p>In power supply metering systems, phase angle errors in electricity meter transformers cause measurement inaccuracies. Traditional calibration methods rely on offline testing and fixed parameter compensation, making them ill-suited for grid frequency fluctuations and dynamic operating conditions, resulting in insufficient calibration precision. To address this, this study proposes an online calibration method for phase angle errors in power supply metering electricity meter transformers based on FFT algorithms and phase compensation technology. High-precision phase extraction is achieved through a three-spectrum-line interpolation fast Fourier transform (FFT) algorithm, effectively suppressing spectral leakage and asynchronous sampling errors. This significantly enhances the robustness of angular difference detection against frequency fluctuations (50 Hz–51.5 Hz) and noise interference (up to 0.35% intensity). Further, a dynamically adjustable RC phase-shifting circuit implements online phase compensation. This circuit adapts parameters based on real-time phase error calculations, enabling continuous phase adjustment within 0–180°, overcoming the poor adaptability of traditional fixed-parameter compensation circuits. This achieves online correction of transformer phase error in utility meters. Experimental data demonstrate: under 50 Hz–51.5 Hz frequency fluctuations and 0.35% noise intensity, this method exhibits minimal angular error detection deviation. Post-correction angular error decreases from 7.1° to 0.15°, meeting the ≤ 0.17° accuracy requirement and effectively countering frequency fluctuations and noise interference.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 1","pages":"301 - 312"},"PeriodicalIF":1.3,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Evaluation of Shadow Shield Whole Body Monitor Equipped with Large Sized NaI(Tl) Detector 配备大型NaI（Tl）探测器的阴影屏蔽全身监测仪性能评价

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-17 DOI: 10.1007/s12647-026-00903-8

Rajesh Sankhla, I. S. Singh, Pramilla D. Sawant, M. S. Kulkarni, Probal Chaudhury

{"title":"Performance Evaluation of Shadow Shield Whole Body Monitor Equipped with Large Sized NaI(Tl) Detector","authors":"Rajesh Sankhla, I. S. Singh, Pramilla D. Sawant, M. S. Kulkarni, Probal Chaudhury","doi":"10.1007/s12647-026-00903-8","DOIUrl":"10.1007/s12647-026-00903-8","url":null,"abstract":"<div><p>The Scan bed-SSWBM is a critical tool in monitoring internal contamination in individuals working in nuclear facilities. Its ability to detect high-energy photon emitting radionuclides makes it an essential device in ensuring the safety and well-being of workers in these facilities. Most of the SSWBM systems in India utilize a 102 mm diameter and 76 mm thick NaI(Tl) scintillation detector. As awareness about radiation safety continues to grow, there is a pressing demand to improve the sensitivity of detecting radioactivity in individuals. The response of the detector in SSWBM is complex due to its intricate shield structure, making it difficult to optimize detection performance. To address this limitation, a study was conducted to explore the potential benefits of using a larger detector size. The study focused on evaluating the performance of a 203 mm diameter and 102 mm thick NaI(Tl) detector with the goal to determine if a larger detector size could enhance the sensitivity of detection. The study focused on examining the effects of detector size and shield design on three crucial parameters that influence radiation detection mainly background, efficiency and Minimum Detectable Activity (MDA). The study utilized the BARC reference BOttle Mannequin ABsorption (BOMAB) phantom, a standardized phantom designed to simulate / mimic the human body. The results demonstrates that by making minimal modifications to the detector shield design and switching to a larger detector size, the current Minimum Detectable Activity (MDA) can be achieved within half the typical counting time. This study highlights the benefits of incorporating larger detectors, which can lead to lower detection levels or increased throughput as required.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 2","pages":"447 - 454"},"PeriodicalIF":1.3,"publicationDate":"2026-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Development of Stabilized RF sources for Optical frequency modulations through Electro-Optic-Modulators (EOMs) 电光调制器调频稳定射频源的设计与开发

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-13 DOI: 10.1007/s12647-026-00898-2

Shubham Utreja, Pallab Roy, Harish Rathore, Sourin Choudhury, Manoj Das, Subhasis Panja

{"title":"Design and Development of Stabilized RF sources for Optical frequency modulations through Electro-Optic-Modulators (EOMs)","authors":"Shubham Utreja, Pallab Roy, Harish Rathore, Sourin Choudhury, Manoj Das, Subhasis Panja","doi":"10.1007/s12647-026-00898-2","DOIUrl":"10.1007/s12647-026-00898-2","url":null,"abstract":"<div><p>Electro-Optic Modulators (EOM) are most commonly used for side band generation or modulations of optical frequencies in GHz ranges. EOM consists of a crystal that changes its refractive index when an external RF voltage is applied and depending on the applied RF frequency, it generates additional frequencies around the carrier optical frequency. However, the EOMs require stable RF frequency and voltage for producing precise and stable sideband frequencies. The present article describes about the development of a voltage-controlled oscillators (VCO) based RF sources for generating tuneable RF frequencies and a phase-locked loop (PLL) for stabilizing the generated frequencies with respect to a reference signal. The reference signals are generated from a direct digital synthesis (DDS) evaluation board. Output frequency of the RF sources are tuneable with a resolution of 10 MHz and the higher order harmonics have insignificant power. The effectiveness or acceptability of the RF sources were tested through characterization of the generated sidebands in the optical frequency domain.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 2","pages":"437 - 445"},"PeriodicalIF":1.3,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of Radiation Exposure from Using Waste Rock from Uranium Mines as Construction Material in Dwellings 铀矿废石作为住宅建筑材料的辐射暴露评估

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-11 DOI: 10.1007/s12647-025-00884-0

Abhigyan, Gopal P. Verma, Ranjan Prakash, V. Kumaraswamy, B. Naresh, Pallavi Singhal, A. C. Patra

{"title":"Estimation of Radiation Exposure from Using Waste Rock from Uranium Mines as Construction Material in Dwellings","authors":"Abhigyan, Gopal P. Verma, Ranjan Prakash, V. Kumaraswamy, B. Naresh, Pallavi Singhal, A. C. Patra","doi":"10.1007/s12647-025-00884-0","DOIUrl":"10.1007/s12647-025-00884-0","url":null,"abstract":"<div><p>In this study, the radiation dose to an occupant living in a dwelling constructed with uranium mine waste rock was estimated. The RESRAD-BUILD software was used to simulate radiological exposure in a model room, where both the floor and ceiling were made using different compositions of uranium mine waste rock. The model room had standard dimensions of 5 × 4 × 2.8 m, with the floor and ceiling built from concrete incorporating waste rock as coarse aggregate (gravel). The occupant was assumed to be located at the center of the room, 1 m above the floor. Potential exposure pathways included external exposure and inhalation of radon and its progeny. The additional dose to the occupant was found to be 0.95 mSvy<sup>−1</sup> for a waste rock composition of 30%, which is below the public dose limit of 1 mSvy<sup>−1</sup>. Additionally, radon concentrations within the room, attributable to the waste rock, ranged from 8.8 to 33.8 Bqm<sup>−3</sup> for waste rock compositions of 25–100%, significantly lower than the recommended action level for radon.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 1","pages":"205 - 210"},"PeriodicalIF":1.3,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uncertainty Evaluation for Activity Measurements Using 4π Gamma Ion Chamber 用4π γ离子室测量活度的不确定度评定

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-11 DOI: 10.1007/s12647-026-00886-6

D. B. Kulkarni, R. Anuradha, Ritu Sharma, Astha Singh, Sneha Chandrasekhar, Probal Chaudhury

{"title":"Uncertainty Evaluation for Activity Measurements Using 4π Gamma Ion Chamber","authors":"D. B. Kulkarni, R. Anuradha, Ritu Sharma, Astha Singh, Sneha Chandrasekhar, Probal Chaudhury","doi":"10.1007/s12647-026-00886-6","DOIUrl":"10.1007/s12647-026-00886-6","url":null,"abstract":"<div><p>National metrology institutes (NMIs) and Designated Institutes (DIs) play a crucial role in establishing and maintaining measurement standards within a country. These institutes are responsible for ensuring the accuracy and traceability of measurements across various fields, including radiation metrology. In India, Radiation Standards Section (RSS) of Bhabha Atomic Research Center (BARC) is the DI and is responsible to develop, establish and disseminate the ionizing radiation standards. As the measurement of activity using primary standards is destructive, cumbersome and time consuming, secondary standards are used to conserve the unit of activity realized by primary standards. The secondary standards are fast and non-destructive and routinely used for activity measurements provides results with slightly higher uncertainty. The 4π Gamma Ion Chamber (GIC) is used as a secondary standard at RSS for activity measurements of gamma emitting radionuclides. The activity of the sample of a gamma emitting radionuclide was determined by measuring the current produced in the GIC using the sensitivity coefficient of a particular radionuclide in the given geometry. Overall, uncertainty evaluation is an essential part of the measurement process ensuring the reliability and traceability of activity measurements carried out using gamma ion chambers. By quantifying and reporting uncertainties, demonstrates the quality and comparability of activity measurements. Various quantities contributing to the overall uncertainty in measurement of activity is described in the paper. The method of the evaluation of uncertainties in these quantities is also discussed in detail.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 1","pages":"191 - 203"},"PeriodicalIF":1.3,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling Spatiotemporal Dynamics of Primary Productivity through a Multi-Proxy Approach in Mumbai Harbour Bay 通过多代理方法揭示孟买港湾初级生产力的时空动态

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-10 DOI: 10.1007/s12647-026-00899-1

V. B. Yadav, Moushumi D. Dutta, Mahesh Tiwari, Vandana A. Pulhani, A. Vinod Kumar

{"title":"Unveiling Spatiotemporal Dynamics of Primary Productivity through a Multi-Proxy Approach in Mumbai Harbour Bay","authors":"V. B. Yadav, Moushumi D. Dutta, Mahesh Tiwari, Vandana A. Pulhani, A. Vinod Kumar","doi":"10.1007/s12647-026-00899-1","DOIUrl":"10.1007/s12647-026-00899-1","url":null,"abstract":"<div><p>Understanding the historical trends of primary productivity in coastal marine systems is essential for assessing ecosystem health and anthropogenic impacts. This study investigates the spatiotemporal variability of primary productivity in Mumbai Harbour Bay using a multi-proxy approach, including total organic carbon (TOC), total nitrogen (TN), stable isotopes (δ<sup>13</sup>C and δ<sup>15</sup>N), and elemental ratios (Ca/Ti and Si/Ti ratio). The sediment core samples from two distinct locations were analyzed to reconstruct past productivity changes. Results indicate a higher accumulation of organic carbon and nitrogen in the surface sediments, suggesting increased primary productivity in recent years. The TOC/TN ratio exhibited a statistically significant negative correlation with depth (<i>p</i> < 0.05), supporting the hypothesis of a progressive rise in marine productivity. The δ<sup>13</sup>C values ranged from − 21.54‰ to − 22.27‰, indicating marine phytoplankton as the dominant organic carbon source. A positive correlation between δ<sup>13</sup>C and depth (correlation coefficient: 0.53, <i>p</i> = 0.03) suggests a long-term steady increase in oceanic productivity. The Ca/Ti and Si/Ti ratios showed declining trends with depth, strengthening the evidence of enhanced primary production over time. This study highlights the importance of long-term monitoring to assess the impacts of environmental changes on marine productivity and ecosystem dynamics in urbanized coastal systems.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 1","pages":"179 - 190"},"PeriodicalIF":1.3,"publicationDate":"2026-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Load Frequency Control in the Two-Area Power System Network for the Measurement and Analysis of Various Performance Parameters Using h-GO-NN Controller Under Different Conditions 基于h-GO-NN控制器的两区电网负荷频率控制在不同工况下的各种性能参数的测量与分析

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-09 DOI: 10.1007/s12647-025-00882-2

Arun Singh Rana, Omveer Singh, C. B. Vishwakarma

{"title":"A Load Frequency Control in the Two-Area Power System Network for the Measurement and Analysis of Various Performance Parameters Using h-GO-NN Controller Under Different Conditions","authors":"Arun Singh Rana, Omveer Singh, C. B. Vishwakarma","doi":"10.1007/s12647-025-00882-2","DOIUrl":"10.1007/s12647-025-00882-2","url":null,"abstract":"<div><p>The frequency deviations and harmonic generation of the two-area power system network under the load disturbances are major challenges of the research. Such variations in frequency also affect other parameters as well. The conventional way of the load frequency control of two-area system is too complex and need more variable for computation In order to overcome such issues, A multi-objective function has been developed by considering the effect of all disturbances. Further, the multi-objective function will be trained by a proposed intelligent controller to resolve such problems. The proposed intelligent controller has been called as heuristic grasshopper optimization neural network (h-GO-NN) controller, which is developed by combining the two topologies, namely the grasshopper optimization algorithm and artificial neural network. The proposed controller is simple, and need less computation variables, which is the novelty of the research. The first step in the entire analysis is the mathematical modelling of the different generating units in each area, including conventional sources (CS), wind turbines (WTS), and solar photovoltaic (PV), all of sources are connected to the common grid. The h-GO-NN controller is used to simulate two area networks in order to examine the different parameters. A number of performance parameters will be measured, including voltage deviation, frequency deviations, area control error (ACE), and total harmonic distortion (THD) of grid voltage. Variable load disturbance, variable solar irradiation, and variable wind operation are the three scenarios in which all such evaluations will be examined. At the end, it is observed that the least frequency deviation, least voltage deviation, minimum ACE and minimum THD (%) have been attained with the proposed h-GO-NN controller in contrast to existing techniques which is one of greatest achievement of proposed controller.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 1","pages":"165 - 178"},"PeriodicalIF":1.3,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integration of Galileo and PPP-AR Enhancements to Improve GNSS Accuracy from India Through Updated MADOCA-PPP 集成伽利略和PPP-AR增强功能，通过更新MADOCA-PPP提高印度GNSS精度

IF 1.3 4区工程技术

MAPAN Pub Date : 2026-02-05 DOI: 10.1007/s12647-026-00896-4

Aiswarya S. Pillai, Somnath Mahato, Mrinal Goswami, Bibekananda Panda, Surajit Kundu

{"title":"Integration of Galileo and PPP-AR Enhancements to Improve GNSS Accuracy from India Through Updated MADOCA-PPP","authors":"Aiswarya S. Pillai, Somnath Mahato, Mrinal Goswami, Bibekananda Panda, Surajit Kundu","doi":"10.1007/s12647-026-00896-4","DOIUrl":"10.1007/s12647-026-00896-4","url":null,"abstract":"<div><p>This study evaluates the real-time performance of MADOCA-based Precise Point Positioning (PPP) services in Eastern India, using a low-cost, SWaP-C-optimized GNSS module, corrections were received via MADOCA-PPP over IP using the MADWIN/NTRIP client service, rather than via broadcast L6 signals. Both the legacy MADOCA correction stream (GPS + GLONASS + QZSS) and the updated version (GPS + GLONASS + Galileo + QZSS with PPP-AR) were assessed over 14,400 epochs and benchmarked against post processed CSRS-PPP service. This is the first report from India on the performance of updated MADOCA PPP service, offering critical insights into its operational potential in the region. Results show that the updated MADOCA configuration significantly improves convergence time, horizontal accuracy, and positioning stability. Key metrics, including 2DRMS, CEP, and MRSE, confirm reductions in horizontal and vertical errors of up to 75% in 2DRMS compared to the legacy model. CSRS-PPP, utilizing post-processed IGS Final products, achieved the highest precision with sub-centimetre accuracy across all dimensions. Signal quality analysis indicated robust carrier-to-noise ratios across GPS, Galileo, and QZSS, supporting reliable satellite tracking and noise resilience. Time series and error distribution analyses further validated the superior performance of the updated MADOCA solution. This research highlights the viability of cost-effective, real-time high-precision GNSS positioning in India using compact hardware, supporting applications in defense, surveying, navigation, and infrastructure monitoring. It also underscores the value of regional PPP customization to overcome environmental and infrastructure challenges, paving the way for scalable deployment of GNSS technologies in resource-constrained settings.</p></div>","PeriodicalId":689,"journal":{"name":"MAPAN","volume":"41 1","pages":"397 - 413"},"PeriodicalIF":1.3,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147631794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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