Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné,...
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Transcript of Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné,...
![Page 1: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/1.jpg)
Lidar overlap control as a mean for extended measurement reliability
Ilya Serikov, Holger Linné,Friedhelm Jansen, Björn Brügmann,
Monika Pfeiffer, Jens Bösenberg
Max Planck Institute for Meteorology, Hamburg
![Page 2: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/2.jpg)
Outline
a) The overlap control issues:
An approach to measure overlap function
Optical scrambler as a solution for identical overlap
Overlap correction in extinction retrieval
b) Lidar / Ceilometer comparison
* The subject presented is illustrated on the data collected with one of two Raman lidars of Max Planck Institute for Meteorology (Hamburg) deployed on Deebles Point, Barbados (59.43W 13.16N) since 04.04.2010
![Page 3: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/3.jpg)
http://pvcdrom.pveducation.org/SUNLIGHT/SUNCALC.HTM
Sun's azimuth and elevation angles, 2010.07.15(projection onto a two-dimensional plane)
![Page 4: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/4.jpg)
Principle optical layout
![Page 5: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/5.jpg)
Telescope assignment
“close” rangeØ 2 cm
“far” rangeØ 40 cm
“near” rangeØ 15 cm
![Page 6: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/6.jpg)
0.01 0.1 1 100
0.2
0.4
0.6
0.8
1
1.2O
verla
p fu
nctio
n
Overlap function & lidar returns
0.01 0.1 1 100.001
0.01
0.1
1
Far rangeNear rangeShort range
Height, km
Nor
mal
ized
lida
r re
turn
s
![Page 7: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/7.jpg)
ALOMAR (Norway), 2009.11.01, 03:00-06:00 UTC
Overlap function, far range telescope
![Page 8: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/8.jpg)
Overlap function, near range telescope
ALOMAR (Norway), 2009.11.01, 03:00-06:00 UTC
![Page 9: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/9.jpg)
Particle backscatter 532nm, far & close range
resolution: 30 minutes, 60÷180 meters
![Page 10: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/10.jpg)
Particle backscatter 532nm, far & close range
resolution: 30 minutes, 60÷180 meters
![Page 11: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/11.jpg)
Particle backscatter 532nm, far & close range
resolution: 2 minutes, 60 meters
![Page 12: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/12.jpg)
Particle backscatter 532nm, far & close range
resolution: 2 minutes, 60 meters
![Page 13: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/13.jpg)
Particle backscatter 355nm, far & near range
resolution: 2 minutes, 60 meters
![Page 14: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/14.jpg)
http://pvcdrom.pveducation.org/SUNLIGHT/SUNCALC.HTM
Sun's azimuth and elevation angles, 2010.04.12(projection onto a two-dimensional plane)
Lidar
FOV
![Page 15: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/15.jpg)
Raman lidar returns, 532nm, near & far range
resolution: signals: 40 minutes, 60m overlap: 3 hours, 60m÷5km
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Statistical uncertainty of lidar returns, near & far range
![Page 17: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/17.jpg)
Raman lidar returns, 532nm, near & far range
resolution: signals: 40 minutes, 60m overlap: 3 hours, 60m÷5km
![Page 18: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/18.jpg)
Statistical uncertainty of lidar returns, near & far range
![Page 19: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/19.jpg)
Particle extinction, 532nm, near & far range
resolution: 40 minutes, 0.18÷3km
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Overlap function, far range telescope, 532nm, 10.04.12
resolution: 3 hours, 60m÷5km
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Overlap function, far range telescope, 532nm, 10.04.12
resolution: 3 hours, 60m÷5km
![Page 22: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/22.jpg)
Particle extinction, 532nm, near & far range
resolution: extinction: 40 minutes, 0.18÷3km overlap: 3 hours, 60m÷5km
![Page 23: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/23.jpg)
Particle extinction, 532nm, near & far range
resolution: extinction: 40 minutes, 0.18÷3km overlap: 3 hours, 60m÷5km
![Page 24: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/24.jpg)
Aerosol optical depth: lidar (0.6-12km) / sun-photometer
We thank J. M. Prospero for establishing and maintaining the AERONET site at Ragged Point, Barbados.
![Page 25: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/25.jpg)
Aerosol optical depth: lidar (0-12km) / sun-photometer
We thank J. M. Prospero for establishing and maintaining the AERONET site at Ragged Point, Barbados.
![Page 26: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/26.jpg)
Aerosol optical depth: lidar (0.6-12km)
mask: particle backscatter > 2 / (Mm sr)
![Page 27: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/27.jpg)
Overlap function, far range telescope, 532nm, 10.07.15
resolution: 3 hours, 60m÷5km
![Page 28: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/28.jpg)
Raman lidar returns, 532nm, near & far range
resolution: signals: 40 minutes, 60m overlap: 3 hours, 60m÷5km
![Page 29: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/29.jpg)
Particle extinction, 532nm, near & far range
resolution: extinction: 40 minutes, 0.18÷3km overlap: 3 hours, 60m÷5km
![Page 30: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/30.jpg)
Particle extinction, 355nm, near & far range
resolution: 40 minutes, 0.18÷3km
![Page 31: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/31.jpg)
resolution: 30 minutes, 0.18÷3km
Particle backscatter & extinction 532nm, far range
![Page 32: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/32.jpg)
resolution: 30 minutes, 0.18÷1.8km
Particle backscatter & extinction 532nm, near range
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resolution: 30 minutes, 180m
Particle backscatter & extinction 532nm, close range
![Page 34: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/34.jpg)
resolution: 30 minutes, 0.18÷3km
Particle backscatter & extinction 355nm, far range
![Page 35: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/35.jpg)
resolution: 30 minutes, 0.18÷1.8km
Particle backscatter & extinction 355nm, near range
![Page 36: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/36.jpg)
resolution: 30 minutes, 180m
Particle backscatter & extinction 355nm, close range
![Page 37: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/37.jpg)
Aerosol optical depth: lidar (0.6-12km) / sun-photometer
We thank J. M. Prospero for establishing and maintaining the AERONET site at Ragged Point, Barbados.
![Page 38: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/38.jpg)
Aerosol optical depth: lidar (0-12km) / sun-photometer
We thank J. M. Prospero for establishing and maintaining the AERONET site at Ragged Point, Barbados.
![Page 39: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/39.jpg)
Attenuated backscatter 1064nm, far/near-range
resolution: 2 minutes, 60 meters
![Page 40: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/40.jpg)
Aerosol optical depth: lidar (0.6-12km)
mask: particle backscatter > 2 / (Mm sr)
![Page 41: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/41.jpg)
Conclusion
a) optical scrambling allows no overlap-depending artefacts in lidar products derived through a signal ratio
b) measuring the overlap (continuously) allows extending the system reliability for extinction retrievalin other words: the lidar may be misaligned to some (even quite significant) extent, we should just know how much is it by measuring the overlap function.
![Page 42: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/42.jpg)
Lidar / Ceilometer comparion
![Page 43: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/43.jpg)
Lidar: attenuated backscatter 1064nm
resolution: 2 minutes, 60 meters
No
rma
lize
d a
tte
nu
ate
d b
ack
sca
tte
r
![Page 44: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/44.jpg)
resolution: lidar: 2min & 60m; ceilometer: 10min & 120m
Attenuated backscatter 1064nm, lidar & “Jenoptik 15k”
![Page 45: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/45.jpg)
resolution: lidar: 2min & 60m; ceilometer: 10min & 120m
Attenuated backscatter 1064nm, lidar & “Jenoptik 15k-x”
![Page 46: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/46.jpg)
Attenuated backscatter 1064nm, lidar & “Jenoptik 15k”
![Page 47: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/47.jpg)
Acknowledgments:
We thank Dr. David A. Farrell (the Caribbean Institute for Meteorology and Hydrology) and his research team, especially Marvin R. Forde, for helping us establishing and maintaining the site.
![Page 48: Lidar overlap control as a mean for extended measurement reliability Ilya Serikov, Holger Linné, Friedhelm Jansen, Björn Brügmann, Monika Pfeiffer, Jens.](https://reader038.fdocuments.in/reader038/viewer/2022110100/56649dc45503460f94ab67fe/html5/thumbnails/48.jpg)
Thank you!