16
Transmitter
Field station
Optical path
RF path
Receiver
H
L
v
E
Figure 3: Schematic picture of a scintillometer installed over a valley. The weather station is located in the
valley.
3.2.2 Installing LAS / XLAS
For reliable
C
n
2
and flux (
H
and
L
v
E
) measurements it is important to meet the installation
requirements of the
LAS
/
XLAS
. These are:
o
The LAS/XLAS must be placed on a robust and vibration free contruction.
o
Avoid
saturation
of the signal by installing the
LAS
/
XLAS
at a minimum level (depends on
surface conditions and path length).
o
Be certain that the
LAS
/
XLAS
is measuring in the
Constant Flux Layer
for reliable flux
derivations of the
C
n
2
signal using MOST (depends on surface characteristics).
For detailed information the reader is referred to section 3.3.1, 3.3.2 and 3.4 of the
LAS
instruction
manual.
3.2.3 Power supply LAS / XLAS
Depending on the customer’s request the power supply of the
LAS
/
XLAS
can be as follows:
1. (Optional) Power Box (12VDC/3.5A, manufactured by Kipp & Zonen).
2. (Optional) Switching Power Box (12VDC/10.5A & 12VDC/0.5A, with built-in backup battery
(85Ah), manufactured by Kipp & Zonen,).
3. Alternative power supply (AC/DC converter, solar-battery power) with output specifications
that meet the requirements of the
LAS
/
XLAS
and additional components.
Summary of Contents for LAS
Page 1: ...Instruction Manual Large Aperture Scintillometer LAS...
Page 28: ...27 Figure 17 Operational weather station of LAS RET system...
Page 29: ...28...
Page 39: ...38...
Page 45: ...44...
Page 49: ...48...
Page 51: ...50 Figure 33 Configuration screen and default settings of supplied RF modems...
Page 55: ...54...
Page 69: ...68...
Page 71: ...70 APPENDIX 9 CONNECTION PLAN LAS BET LAS RET Figure 47 Connection plan LAS BET system...
Page 72: ...71...
Page 73: ...72 Figure 48 Connection plan weather station LAS RET system...
Page 74: ...73 Figure 49 Connection plan scintillometer LAS RET system...
