Card 6u - DIURNAL1 Solar Heating Modeling Request

This optional card defines a diurnal solar heating modeling request.

A diurnal heating request calculates solar and other heat flux view factors for a model located on a planet’s surface.


Parameter	Value	Description
`DIURNAL1`	DIURNAL1 (or 61)	Mnemonic
`ID`	Integer	Request ID number
`SHADOPT`	S1	Calculations are done with shadowing for requested elements
	N1	Calculations are done without shadowing for requested elements
	SALL	Calculations are done with shadowing for all elements
	NALL	Calculations are done without shadowing for all elements
`PNAME`	MERCURY	Planet is Mercury
	VENUS	Planet is Venus
	EARTH	Planet is Earth
	MARS	Planet is Mars
	JUPITER	Planet is Jupiter
	SATURN	Planet is Saturn
	URANUS	Planet is Uranus
	NEPTUNE	Planet is Neptune
	PLUTO	Planet is Pluto
	MOON	Planet is the Moon
	GENERIC	Generic planet
`V1OPT`	SUN	vector1 points towards the Sun
	NORTH	vector1 points North
	SOUTH	vector1 points South
	EAST	vector1 points East
	WEST	vector1 points West
	ZENITH	vector1 points towards the zenith
	GRAVITY	vector1 points towards the planet center
`V2OPT`	SUN	vector2 points approximately towards the Sun
	NORTH	vector2 points approximately towards North
	SOUTH	vector2 points approximately towards South
	EAST	vector2 points approximately towards East
	WEST	vector2 points approximately towards West
	ZENITH	vector2 points approximately towards the zenith
	GRAVITY	vector2 points approximately towards the planet center
`FRONTGRP`	Group name or integer	Element ID or group name of front facing elements
`REVGRP`	Group name or integer	Element ID or group name of elements whose reverse side is to be included

SHADOPT

SHADOPT is the shadowing option to be used for the selected elements.

PNAME

PNAME is the planet name.

For planets other than the Earth, both the sun declination angle and the sun right ascension angle must be specified.
For planets other than Earth, the PNAME field has no effect, and is used for display purposes only.
For Earth, only the sun declination angle needs to be specified.

V1OPT

V1OPT is the flag for target1, the target vector1 is aligned with. vector1 is the first of two vectors fixed with respect to the model’s global coordinate system needed to specify the orbit.

The model is so oriented that vector1 is locked onto target1.

The components of vector1 are specified on the DIURNAL2 Card.

V2OPT

V2OPT is the flag for target2, the target towards which vector2 is aimed. vector2 is the second of two vectors fixed with respect to the global coordinate system.

A plane defined by vector1 and the origin-to-target2 vector is created.

The model is so oriented that vector2 lies in this plane, and the angle between vector2 and the origin-to-target2 vector is minimal.

The components of vector2 are specified on the DIURNAL2 Card.

FRONTGRP

FRONTGRP is the element ID or the group name of the elements for whose front side the fluxes are to be calculated.

Should be blank or 0 if the SHADOPT is NALL or SALL.

This field should be 0 if only a reverse group is selected.

REVGRP

REVGRP is the element ID or the group name of the elements for whose reverse sides fluxes are to be calculated.

Should be blank or 0 if the SHADOPT is NALL or SALL.

Should be blank or 0 if no reverse sides are to be included in the orbital flux calculations.

Code example


DIURNAL1 ID NALL/SALL PNAME V1OPT V2OPT
DIURNAL1 3 S1 EARTH SUN NORTH FRONTARRDIURNAL1 3 S1 EARTH SUN NORTH 0 REVARR
DIURNAL1 3 SALL EARTH EAST NORTH

Notes

All fields are required on all the Cards, except when otherwise specified. If the value in a field is to be ignored and cannot be blank, it must be zero.

ID is the request number and is an integer value common to all associated DIURNAL Cards.