A User's Manual for DELSOL3 - prod.sandia.gov - Sandia National ...

SIGTX
SIGTY
ICANT
NCANTX
NCANTY
HCANT
DCANT
RCANT( K)
(K=l, NRAD)
XFOCUS
XFOCUS
- -~
*See note on page 47 about default error values.
184
Constraint: Same as SIGEL, SIGAZ
Default: SIGSX = 0.001 (rad
SIGSY = 0.000 (rad 1 ' (1I.D-1 ,II.D-3)
Standard deviations, in radians, of the normal error
distribution of the reflected vector; caused by atmospheric
refraction, tower sway, etc. SIGTX is in the horizontal
direction; SIGTY in the direction perpendicular to the SIGTX
direction
Constraint: Same as SIGEL, SIGAZ
Default: SIGTX = 0.000 rad
SIGTY = 0.000 (!I rad (1I.D-1 ,II.D-3)
Canting parameter:
= 0, no canting;
= -1, individual on-axis cant at a distance equal to
the slant range;
= 1, user defined on-axis canting. The canting is
specified by the RCANT array defined below; (can
be used to produce a single cant for the whole field).
= 3, individual off-axis cant at time defined below
by DCANT, HCANT.
Default: ICANT = 1 (1I.D-2 ,II. D-3)
Number of submirror panels in a canted heliostat equals
NCANTX times NCANTY; there are NCANTX panels in the i,,
direction, NCANTY in the direction.
Constraint: NCANTX*NCANTY 5 25
Default: NCANTX = 2
NCANTY = 8 (11. D-2,11.D-3)
Parameters defining off-axis cant; heliostats are canted
at HCANT hours past noon on the DCANT day of the year.
Default: HCANT = 0.0
DCANT = 81.0 (1II.A-5,11.D-2)
Focal length, in units of tower heights, THT (Namelist
REC), at which all heliostats in the Kth radial zones are
canted; can be used to define one canting for the whole field.
Constraint: ICANT = 1
Default: RCANT = 13'6.00 (1I.D-2,11.D-3)
Parameters specifying focusing or no focusing of mirror
panel or subpanels (submirrors can be focused as well as
canted). XFOCUS specifies focusing in the i,, direction,
YFOCUS in the j,, direction.
XFOCUS or YFOCUS = 0.0
XFOCUS or YFOCUS = 1.0
No focusing in corresponding
direction
Focusing in corresponding
direction