Large Aperture Scintillometer Large Aperture Scintillometer

(LAS)(LAS)

Operational procedure at micromet-KCL

Version 4 – Strand Roof

Mariana L. Gouvea

September 2009

InstrumentInstrument

AlignmentAlignment

SettingsSettings

•• Current adjust at transmitter back panel

adjusted to 400 mA

• Path length potentiometer setting at

receiver back panel set to 470 – given by

equation 1a, page 24 of the LAS manual –

NOT equal to the distance in meters!

LocationLocation

KCL - Receiver

JCM - Transmitter

808 m

•• Move vertically and horizontally until

maximum signal (at receiver back panel)

• Repeat procedure at both ends

(transmitter and receiver)

• Important: Do NOT align using only the

telescopes!

• More detailed instructions in the

instrument’s manual – page 20.

1

LAS

Instrument

Roof 6

(Strand roof – right)

Otago

(Sue’s office)

LoggerNet (see setup)

CR1000

Datalogger

(see wiring diagram)

GRAB HOURLY FILES

C:\LAS_data\CR1000_LASfast.dat

C:\LAS_outdata\LasFastYYDDD_HH.txt

Fast files: 10 Hz data

Slow files: 15 min averaged data

C:\LAS_data\CR1000_LAS.dat

H:\RawData\London\KCLroof\YYYY\LAS\Hourly\

LasFastYYDDD_HH.txt

Hourly files: 10 Hz data

Scheduled task: LASDailyPlot

(run every day at 02:24 h)

StrandLogger_V3.CR1

Scheduled task:

HourlySplit_LASstrand_v2

(run every 04 minutes past the hour)

Daily files: 15 min averaged data

Scheduled task: GAS-LAS-WXT-Ceil

(run every 10 minutes past the hour)

Scheduled task:

DailySplit_LASstrand_v2

(run every day at 00:03 h)

SP

LIT

SP

LIT

C:\LAS_outdata\las_YYDDD.txtGRAB DAILY FILES and DATA

PROCESSING (DAILY PLOT)

(run every day at 02:24 h)

H:\RawData\London\KCLroof\YYYY\LAS\flux\

• LASflux_YYDDD.txt

• LASflux_YYDDD_15.txt

Processed data files:

H:\RawData\London\KCLroof\YYYY\LAS\plots\

• LASplot_DDD.jpg

• LASplotH_DDD.jpg

• LASmod_DDD.jpg

• LASplotU_DDD.jpg

Plots:

H:\RawData\London\KCLroof\YYYY\LAS\Daily\

las_YYDDD.dat

Daily files: 15 min averaged data

• H:\RawData\London\KCLroof\

WXT510\MM\LRYYYYDD_15.txt

• KCL_params_v0.txt

External files

(run every day at 00:03 h)

Specification from

LAS manual Cn2

Orange

Green

High

Low

Diff channel 1

Diff channel 1 *

DemodBrown

x

High

Low

Diff channel 2

Diff channel 2 *

* Must be connected with small wire (Both signals common signal ground)

WiringWiring

Cable extension IN (from LAS) OUT (to datalogger)

Orange Yellow

Power 12V DC

- BluePower GND

- Violet

YE

LLO

W

GR

EE

N

H L

RE

D

H L

GR

OU

ND

Channel 7 Channel 8

Wire connection to

channels 7 and 8

BLA

CK

BLU

E

12V GND

Green

Brown

Green

Red

Violet

Blue

Black

Blue

DataloggerDatalogger program: program: StrandLogger_LAS_V2.CR5

'CR5000

'Strand roof logger

'Program for LAS data - to be combined with other instruments

'Created by Mariana Gouvea 02/04/2009 - based on HutLogger_V1.CR3

'Constants **************************************************

Const scan_interval = 100 '100 mSec

'Declare Variables and Units ************************************

Public UCn2

Public DEMOD

Units UCn2 = V

Units DEMOD = mV

Dim PUCn2

Units PUCn2 = m-2/3

'Main Program **********************************************

BeginProg

Scan (scan_interval,mSec,1,0)

VoltDiff (UCn2,1,mV5000,19,true,0,250,0.001,0)'mV to V

VoltDiff (Demod,1,mV5000,20,true,0,250,1.0,0)

PUCn2 = (10^UCn2)*1000

CallTable fast

CallTable LAS

NextScan

Units PUCn2 = m-2/3

'Define Data Tables *******************************************

'LAS slow: sample rate 10 Hz, average period 15 min

DataTable(LAS,true,-1)

DataInterval (0,15,min,10)

Average(1,UCn2,IEEE4,0)

StdDev(1,UCn2,IEEE4,0)

Average(1,Demod,IEEE4,0)

StdDev(1,Demod,IEEE4,0)

Average(1,PUCn2,IEEE4,0)

EndTable

'LAS fast: raw data table

DataTable (fast,true,-1)

Sample(1,UCn2,IEEE4)

Sample(1,Demod,IEEE4)

EndTable

EndProg

LoggerNetLoggerNet setup: setup:

PakBus Port

Hardware

Standard:

Y Communication enabled

ComPort connection: COM4

Advanced:

N Call-back enabled

Extra response time: 00s

Delay hangup: 00s

ComPort communication delay: 00s

Hardware

Standard:

COM4 Hardware

Standard:

Y Communication enabled

Y Call-back enabled

PakBus address: 1

Advanced:

Maximum packet size: 1000

Security code: 0

Delay hangup: 00s

N Enabled automatic hole collection

Schedule

Y Scheduled connection enabled

Collection interval: 0d 00h 6m 00s

Primary retry: 0d 00h 2m 00s

Number of primary retries: 3

Y Secondary retry interval: 0d 00h 15m 00s

When the server’s table definition are

invalid: Automatically reset changed tables

Base: Date: 29/01/2009 Time: 00:01:01

CR3000

N Include array ID

Data Files

Y Included for scheduled collection

Table: Output file name:

Attention to file format!

Y Communication enabled

N PakBus port always open

Maximum time online: 00h 00m 00s

Maximum baud rate: 115200

Beacon interval: 00h 00m 00s

Advanced:

Extra response time: 00s

Delay hangup: 00s

PakBus Nodes

Empty

N Include array ID

Timestamp options:

Y Year; Y Day; Y Hour/minutes;

N/Y Seconds*; N Midnight is 2400

Max and Min timestamp options:

N TOA format

Y Array datalogger format

hour/minutes and seconds

Table:

Fast

LAS

Output file name:

C:\LAS_data\CR3000_Fast.dat

C:\LAS_data\CR3000_LAS.dat

N Use default file name

File output option: Append to file

Output format: Array compatible CSV

Collect mode:

Y Data logged since last collection

Y Collect all on first collection

N Most recently logged records * Seconds: Y for fast files, N for slow files

Program

StrandLogger_V3.CR1

Clock

Time zone offset: 00h 00m

Automated clock check:

Y Enabled

Initial date: 01/01/1990

Initial time: 01:15:00

Interval: 0d 00h 05m

Allowed clock deviation: 00s

% Constants:

%

0.4 %1 k = Von Karman constant

9.8 %2 g = gravity acceleration (m s-2)

287 %3 R = gas constant (J kg-1 K-1)

7.9E-7 %4 gama = cte in Ct2 equation (K Pa-1)

4.9 %5 cu1

6.1 %6 cu2

4.9 %7 cs1

2.2 %8 cs2

%

%

% Parameters:

Parameters file: Parameters file: KCL_params_v0.txt

0

0.0005

0.001

0.0015

0.002

0.0025

0.003

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Weightening function

1.0 %9 z0 = roughness legth

27.0 %10 zl = LAS height

18.0 %11 dl = LAS displacement height

48.1 %12 zu = height of wind measurements

-5

0

5

10

15

20

25

30

35

40

45

50

0 100 200 300 400 500 600 700 800

He

igh

t (m

)

Distance from the receiver (m)Strand roof

(receiver)

JCMB

(transmitter)

1. Otago:

1.1. Check files

• Check if files exist, if they are in the correct directories and if they have the correct format

1.2. Check scheduled tasks

• Run scheduled task again

• If MATLAB error: try and track problem or contact responsible person

• Check schedule (if set up to run at correct time)

OBS: Daily plot should not stop due to missing files, but generate blank plots.

Daily Plot TroubleshootingDaily Plot Troubleshooting

2. Roof 6:

2.1. Check files

• Check if files exist, if they are in the correct directories and if they have the correct format

2.2. Check scheduled tasks (splitting)

• Run scheduled task again

• Check schedule (if set up to run at correct time)

2.3. Check LoggerNet setup

• Attention to download schedule

• Attention to output files naming and format

File formatsFile formats

Fast files: 10 Hz data

File name structure: CR1000_LASfast.dat

Generated by: datalogger

Column Variable Unit

1 Year

2 DOY

Slow files: 15 min averaged data

File name structure: CR1000_LAS.dat

Generated by: datalogger

Column Variable Unit

1 Year

2 DOY

(from (from dataloggerdatalogger –– before splitting)before splitting)

3 HHMM

4 Second

5 UCn2 V

6 Demod mV

3 HHMM

4 UCn2 V

5 σ UCn2 V

6 Demod mV

7 σ Demod mV

8 PUCn2 m-2/3

Hourly files: 10 Hz data

File convention for data files stored in:

H:\RawData\London\KCLstrand\YYYY\LAS\Hourly

File name structure: LasFastYYDDD_HH.dat

File convention started: 15:00 DOY 311 2008

(check for previous format from 23:00 DOY 199/2007)

Generated by: HourlySplit_LASstrand_v2

File formatsFile formats(raw data after splitting)(raw data after splitting)

Daily files: 15 min averaged data

File convention for data files stored in:

H:\RawData\London\KCLstrand\YYYY\LAS\Daily

File name structure: las_YYDDD.txt

File convention started: 22/09/2009

Generated by: DailySplit_LASstrand_v2

Column Variable Unit

Column Variable Unit

1 DOY

2 Hour

3 Minute

4 Second

5 UCn2 V

6 Demod mV

Column Variable Unit

1 Year

2 DOY

3 Hour

4 Minute

5 UCn2 V

6 σ UCn2 V

7 Demod mV

8 σ Demod mV

9 PUCn2 m-2/3