These directories contain the ESRF undulator source parameters in 
syned format for the current lattice and the new (EBS) lattice. 

syned is: https://github.com/lucarebuffi/syned
The files are created using: 
https://github.com/srio/shadow3-scripts/blob/master/ESRF-LIGHTSOURCES/read_csv.py

The different versions of syned files are available in different directories:

  lightsources:  a link to the latest directory, now lightsources3

  lightsources1: the lattice parameters are taken from the Orange Book pag 74-75

  lightsources2: the lattice parameters are updated according to parameters
                 extracted from S28D.mat AT lattice file for EBS, and esrf.mat 
                 for high and low beta section of the current lattice. 

                 The values used are: 

                 #ULATTICEFILE S28D.mat
                 #UEPSILONX      1.3166e-10
                 #UEPSILONY           5e-12
                 BETAX         6.89997
                 BETAY          2.6447
                 SIGMAX         30.1836
                 SIGMAY         3.63641
                 SIGMAXP         4.36821
                 SIGMAYP         1.37498
                 
                 #ULATTICEFILE esrf.mat
                 #UEPSILONX           4e-09
                 #UEPSILONY           4e-12
                 ----------- HIGH BETA --------------
                 BETAX         37.5946
                 BETAY         2.94728
                 SIGMAX         414.971
                 SIGMAY         3.43353
                 SIGMAXP         10.3149
                 SIGMAYP         1.16498
                 ----------- LOW BETA --------------
                 BETAX        0.348126
                 BETAY         2.96631
                 SIGMAX         50.3973
                 SIGMAY         3.44459
                 SIGMAXP         107.192
                 SIGMAYP         1.16124

  lightsources3: Same as lightsources2 but some files have been renamed to 
                 two digits after ID, e.g., ESRF_ID01_EBS_PPU35_22.json 
                 instead of ESRF_ID1_EBS_PPU35_22.json