var fDesc=new Array(); fDesc[0] = "It creates simulations by accurately tracing up to several million light rays through mathematical models of ice crystals.

Main Features:

- Simulations can be run immediately. Select from ready to run simulations of common and rare halos with text descriptions.
- Crystals. Halos from all crystals are simulated; hexagonal plates, columns, pyramidals and non water-ice crystals which might be found in other planetary atmospheres.
- Orientations. Files for plate, singly oriented columns, Parry and Lowitz orientations included. Others can be generated. Axial dispersions and dispersion distributions can be specified.
- Complex halo displays are simulated. HaloSim simultaneously computes up to twelve crystal-orientation combinations."; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }