TOLOLO SLODAR Campaign

Aim: comparison of various site monitoring instruments in view of estimating SLODAR data quality

Database description


The following instruments are included in the Tololo SLODAR campaign:
-SLODAR, Richard Wilson, U. of Durham
-SODAR, Tony Travouillon, Caltech
-MASS-T3, Andrei Tokovinin, CTIO
-DIMM-T3, Andrei Tokovinin, CTIO
-Meteo Mast, Tololo


Each instrument provides datafiles with the format described below. The data files contain only valid data after reduction.


1- SLODAR
UTDATE (YYYY MM DD) UTHour (decimal, end of 15s accumulation)  DelHeight (m) R0 (cm) Cn1 ...Cn8 Cn9 (m+1/3x10-15)

r0=seeing at zenith and 0.5mum over [0,infty[, static contribution removed
DelHeight=vertical resolution
Cn1=SLODAR sensed integrated Cn2 in altitude slab [0,Delheight/2]
Cni [i=2,8]=SLODAR sensed integrated Cn2 in altitude slab [i-1,i]xDelHeight-DelHeight/2
Cn9=SLODAR unsensed integrated Cn2 (from 7.5xDelheight altitude upwards)

2- SODAR
UTDATE (YYYY MM DD) UTHour (decimal, end of 20mn accumulation)  DelHeight (m) Seeing (arcsec) Cn1 ...Cn38 (m+1/3x10-13)

Seeing=seeing at zenith and 0.5mum over 40-800m
DelHeight=vertical resolution
Cni [i=1,38]=sensed integrated Cn2 over altitude slab [i-1,i]xDelheight+40

3-MASS
UTDATE (YYYY MM DD) UTHour (decimal, center of 1mn accumulation)  Seeing (arcsec) Cn1 ...Cn6 (m+1/3x10-13)

Seeing=seeing at zenith and 0.5mum, free atmosphere
Cni [i=1,6]=integrated Cn2 over altitude slab centered in .5,1,2,4,8,16 km

4-DIMM
UTDATE (YYYY MM DD) UTHour (decimal, end of 20s accumulation)  Seeing (arcsec) 

Seeing=seeing at zenith and 0.5mum over [6m,infty[, extrapolated to zero exposure from 6 steps of 5ms

5-METEO
UTDATE (YYYY-MM-DD) UTHour (HH:MM:SS, end(?) of 5mn accumulation) Parameter

Parameter= humd, press, temp, wdir, wspd