Reflectometers

SMIGOL L-band GNSS reflectometer

Description

For local constant monitoring and sensor networks.

This sensor can be understood as a bi-static radar where the GPS satellite is the emitter and SMIGOL the receiver. SMIGOL analyzes the difference between the signal received directly on the sensor and the one reflected from ground to the sensor. The difference between these two signals can be used to obtain soil related measurements.

Advantages

  • Soil moisture and altimetry measurements
  • Data is obtained through non invasive methods: not interfered by animals nor ground vehicles.
  • To be installed on a pole. Area covered: three times pole height
  • Fully autonomous: fed by solar panels, and data transmitted via GPRS receiver.

Applications

Agriculture and environment

  • Local soil moisture
  • Irrigation planning
  • Vegetation heigh

Civil Engineering and minning

  • Levee monitoring
  • Water level measurement

Main technical specifications

GNSS Reflectometer

  • Available frequencies GPS, Galileo, Beidou
  • Antenna configurations: 
    • towards the horizon (SMIGOL like)
    • up-looking and downlooking antenna
  • RAW data capture
  • Sampling rate: up to 10 Hz

Power input

  • Voltage: 12 V
  • Electronics current consumption < 0.5 A

Data

  • Internal storage
  • Ethernet interface communication
  • Wireless IoT interface

SMIGOL references

Snow Thickness Monitoring Using GNSS Measurements

Rodriguez-Alvarez, N.; Aguasca, A.; Valencia, E.; Bosch-Lluis, X.; Camps, A.; Ramos-Perez, I.; Hyuk Park; Vall-llossera, M.
Geoscience and Remote Sensing Letters, IEEE, 2012.
Go to abstract

Soil Moisture Retrieval Using GNSS-R Techniques: Experimental Results Over a Bare Soil Field

Rodriguez-Alvarez, N.; Bosch-Lluis, X.; Camps, A.; Vall-llossera, M.; Valencia, E.; Marchan-Hernandez, J.F.; Ramos-Perez, I.
Geoscience and Remote Sensing, IEEE Transactions, 2009.
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Soil moisture and vegetation height retrieval using GNSS-R techniques

Rodriguez-Alvarez, N.; Monerris, A.; Bosch-Lluis, X.; Camps, A.; Vall-llossera, M.; Marchan-Hernandez, J.F.; Ramos-Perez, I.; Valencia, E.; Martinez-Fernandez, J.; Sanchez-Martin, N.; Baroncini-Turricchid, G.; Perez-Gutierrez, C.
Geoscience and Remote Sensing Symposium,2009 IEEE International, IGARSS 2009.
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Vegetation Water Content Estimation Using GNSS Measurements

Rodriguez-Alvarez, N.; Bosch-Lluis, X.; Camps, A.; Ramos-Perez, I.; Valencia, E.; Hyuk Park; Vall-llossera, M.
Geoscience and Remote Sensing Letters, IEEE 2012.
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Water level monitoring using the interference pattern GNSS-R technique

Rodriguez-Alvarez, N.; Bosch-Lluis, X.; Camps, A.; Ramos-Perez, I.; Valencia, E.; Park, H.; Vall-llossera, M.
Geoscience and Remote Sensing Symposium (IGARSS), 2011.
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