The monitoring of lake surface and its water quality is a crucial issue for most national and international agencies since lakes are places that are of great importance from the point of view of tourism, leisure, sport and recreation. The monitoring of parameters that provide explicit evidence of the health state of a lake, affects significantly the economic stability of a country, at both national and local level, and thus the constant monitoring and evaluation of parameters that indicate the quality of the lake is an essential tool for making informed lake management decisions. However, the use of ground monitoring stations based on wireless sensor networks requires high cost for design and management as well as long time for the acquisition of data useful to assess the health status of the entire surface of the lake. As a consequence, these systems are prevalently used for monitoring only small fractions of a lake. In this context, it is clear that the use of parameters estimation methods based on satellite remote sensing systems represents a cost-effective tool to be integrated to ground-based monitoring programs and can facilitate the evaluation of metrics related to water quality. In fact, these instruments can provide values accurately measured on the entire surface of a lake, and gives spatially unbiased information on parameters of a targeted lake. In this paper we analyze the clock-phase anomalies detector based on the GLRT, a method based on a threshold criterion and we propose an operative point of view for applying the algorithm to measured data in order to effectively and promptly detecting a phase jump or a phase variance change that could lead to an anomalous clock behavior.

Reliability of Lakes Monitoring by means of satellite based systems

NUNZI, Emilia;
2014

Abstract

The monitoring of lake surface and its water quality is a crucial issue for most national and international agencies since lakes are places that are of great importance from the point of view of tourism, leisure, sport and recreation. The monitoring of parameters that provide explicit evidence of the health state of a lake, affects significantly the economic stability of a country, at both national and local level, and thus the constant monitoring and evaluation of parameters that indicate the quality of the lake is an essential tool for making informed lake management decisions. However, the use of ground monitoring stations based on wireless sensor networks requires high cost for design and management as well as long time for the acquisition of data useful to assess the health status of the entire surface of the lake. As a consequence, these systems are prevalently used for monitoring only small fractions of a lake. In this context, it is clear that the use of parameters estimation methods based on satellite remote sensing systems represents a cost-effective tool to be integrated to ground-based monitoring programs and can facilitate the evaluation of metrics related to water quality. In fact, these instruments can provide values accurately measured on the entire surface of a lake, and gives spatially unbiased information on parameters of a targeted lake. In this paper we analyze the clock-phase anomalies detector based on the GLRT, a method based on a threshold criterion and we propose an operative point of view for applying the algorithm to measured data in order to effectively and promptly detecting a phase jump or a phase variance change that could lead to an anomalous clock behavior.
2014
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/1342289
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact