slcsat_night_mod - construct a SLCSAT night refractive atmospheric model.

Calling Sequence

[ram]=slcsat_night_mod(nlayers,layer_heights[,tf])

Parameters

• nlayers : the number of the layers.
• layer_heights : the layer heights array (its dimension is nlayers).
• tf : the 3D frame.it is the global frame if defaulted
• ram :the output refractive atmospheric model.

Description

construct SLCSAT night refractive atmospheric model. it implement a multilayer approximation to the analytic SLCSAT night time atmospheric model. Sasiela p. 61 states the analytic model as (where the height h is in meters):

To generate a multilayer approximation to this model, the user must supply a vector of layer heights to the constructor. The convention for assigning turbulence weights to the layers is as follows. The C_{n}^{2} profile is integrated from the ground to the midpoint between the first and second layer, and this weight is assigned to the first layer. The profile is integrated from this point to the midpoint between the second and third layers, and this weight is assigned to the second layer. For the highest layer, the profile is integrated from the midpoint between the second highest layer and the highest layer to infinity.

Examples

	high=[];
	for i=1:5
		high=[high,100*(i+1)];
	end
	ram=slcsat_night_mod(5,high);
	num=atm_mod_lay_number(ram);
 

Author

Chen jingyuan, Gan guangyong (IAPCM, Beijing,China.)

See Also

power_spectrum ,   ref_atm_lay ,   ell_cer_pac_mod ,   ell_mau_kea_mod ,   pal_dimm_mass_mod ,   ref_atm_model ,   huf_val_mod ,   slcsat_day_mod ,   tmt_srd_v13_cn2_mod ,   gemini_glao_study_mod ,   get_atm_mod_dwfh ,   get_atm_mod_layers ,   atm_mod_layers_fits ,   atm_mod_lay_number ,   atm_mod_lay_heights ,   atm_mod_lays_transform ,   atmosphere ,