wannberg, g., i. wolf, l.g. vanhainen, k. koskenniemi, j. röttger, m. postila, j. markannen, r....
TRANSCRIPT
Wannberg, G., I. Wolf, L.G. Vanhainen, K. Koskenniemi, J. Röttger, M. Postila, J. Markannen, R. Jacobsen, A. Stenberg, R. Larsen, S. Eliassen, S. Heck, and A. Huuskonen, "The EISCAT Svalbard Radar: A case study in modern incoherent scatter radar system design", Radio Sci., 32 6, 2283-2307, 1997.
Wannberg, G., I. Wolf, L.G. Vanhainen, K. Koskenniemi, J. Röttger, M. Postila, J. Markannen, R. Jacobsen, A. Stenberg, R. Larsen, S. Eliassen, S. Heck, and A. Huuskonen, "The EISCAT Svalbard Radar: A case study in modern incoherent scatter radar system design", Radio Sci., 32 6, 2283-2307, 1997.
The Earth’s
Ionosphere
and
Atmosphere
range
time
Electron density
Electron temperature
Ion temperature
Ion velocity
Atmospheric coupling processes from above (magnetosphere) and
below (troposphere and middle atmosphere) are particularly pronounced
in the high latitude mesopause region.
In the high latitude polar lower atmosphere
coupling and exchange processes play a major
role between the troposphere and the
stratosphere.
Radars contribute essen-tially to studies of these
processes.
Atmospheric coupling processes from above (magnetosphere) and
below (troposphere and middle atmosphere) are particularly pronounced
in the high latitude mesopause region.
In the high latitude polar lower atmosphere
coupling and exchange processes play a major
role between the troposphere and the
stratosphere.
Radars contribute essen-tially to studies of these
processes.
The international program CAWSES (Climate And Weather of the Sun Earth System) covers these
research directions.
The international program CAWSES (Climate And Weather of the Sun Earth System) covers these
research directions. Page F 44 - 306
Page C 01
Page C 02
For MST radar observations one has to consider that scattering as well as partial reflection can occur.
For MST radar observations one has to consider that scattering as well as partial reflection can occur.
1 msec
150 km
Such Gaussian (Lorentzian) spectral shape is characteristic for
ionospheric incoherent scatter echoes from the D-region.
We will now show the system set-up of an incoherent scatter
radar, but will not treat the science in any further details in
this course, but then concentrate on coherent MST
radar systems.
Such Gaussian (Lorentzian) spectral shape is characteristic for
ionospheric incoherent scatter echoes from the D-region.
We will now show the system set-up of an incoherent scatter
radar, but will not treat the science in any further details in
this course, but then concentrate on coherent MST
radar systems.
Coherent scatter (MST) radar
Incoherent scatter (IS) radarPage C 11
Page C 04
Page C 03
We first (this week) learn about the radar hardware basics and then (next week) treat the digital processing of:
Radar range gating,coherent complex digital sampling,range-time matrix,digital radar data display,coherent integration, coding/decodingcomplex covariance function,complex Doppler spectrum,
parameter deduction.Basics of phased antenna arrays,radiation pattern calculation,radar interferometry and imaging.
Finally a summary of radar methods for atmosphere and ionosphere research and
explanation of some typical results, incl. coherent and incoherent scatter.
We first (this week) learn about the radar hardware basics and then (next week) treat the digital processing of:
Radar range gating,coherent complex digital sampling,range-time matrix,digital radar data display,coherent integration, coding/decodingcomplex covariance function,complex Doppler spectrum,
parameter deduction.Basics of phased antenna arrays,radiation pattern calculation,radar interferometry and imaging.
Finally a summary of radar methods for atmosphere and ionosphere research and
explanation of some typical results, incl. coherent and incoherent scatter.