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//
// GENERATED FILE
//
use super::*;
use f2rust_std::*;
const NABCOR: i32 = 15;
const ABATSZ: i32 = 6;
const GEOIDX: i32 = 1;
const LTIDX: i32 = (GEOIDX + 1);
const STLIDX: i32 = (LTIDX + 1);
const CNVIDX: i32 = (STLIDX + 1);
const XMTIDX: i32 = (CNVIDX + 1);
const RELIDX: i32 = (XMTIDX + 1);
const CORLEN: i32 = 5;
const NUMLIM: f64 = 0.000001;
const NRSNGL: f64 = 0.000001;
const ABSTOL: f64 = 0.000001;
const TIGHT: f64 = 0.0000000000001;
const VTIGHT: f64 = 0.00000000000001;
const MEDIUM: f64 = 0.0000000001;
const LOW: f64 = 0.0001;
const LNSIZE: i32 = 80;
const NCASES: i32 = 20;
const SSB: i32 = 0;
const NSAMP: i32 = 15;
//$Procedure F_ZZSTELAB ( Tests for stellar aberration corrections )
pub fn F_ZZSTELAB(OK: &mut bool, ctx: &mut Context) -> f2rust_std::Result<()> {
let mut TITLE = [b' '; LNSIZE as usize];
let mut ACC = StackArray::<f64, 3>::new(1..=3);
let mut ANGLES = StackArray::<f64, 15>::new(1..=NSAMP);
let mut DPCOR2 = StackArray::<f64, 3>::new(1..=3);
let mut DPCORR = StackArray::<f64, 3>::new(1..=3);
let mut E1 = StackArray::<f64, 3>::new(1..=3);
let mut E2 = StackArray::<f64, 3>::new(1..=3);
let mut E3 = StackArray::<f64, 3>::new(1..=3);
let mut PCORR = StackArray::<f64, 3>::new(1..=3);
let mut PCORR2 = StackArray::<f64, 3>::new(1..=3);
let mut POBS = StackArray::<f64, 3>::new(1..=3);
let mut POBS0 = StackArray::<f64, 3>::new(1..=3);
let mut PTARG = StackArray::<f64, 3>::new(1..=3);
let mut PTARG0 = StackArray::<f64, 3>::new(1..=3);
let mut R: f64 = 0.0;
let mut RMAT = StackArray2D::<f64, 9>::new(1..=3, 1..=3);
let mut S: f64 = 0.0;
let mut SEP: f64 = 0.0;
let mut STARG = StackArray::<f64, 6>::new(1..=6);
let mut T: f64 = 0.0;
let mut T0: f64 = 0.0;
let mut TAU: f64 = 0.0;
let mut TDELTA: f64 = 0.0;
let mut UPOBS = StackArray::<f64, 3>::new(1..=3);
let mut UVOBS0 = StackArray::<f64, 3>::new(1..=3);
let mut VOBS = StackArray::<f64, 3>::new(1..=3);
let mut VTARG = StackArray::<f64, 3>::new(1..=3);
let mut W: f64 = 0.0;
let mut Q: i32 = 0;
let mut RM: i32 = 0;
let mut XMIT: bool = false;
//
// Test Utility Functions
//
//
// SPICELIB Functions
//
//
// Local parameters
//
//
// NUMLIM is the approximate limiting value of the angular
// separation of the observer's velocity and the observer-
// target position vector used by ZZSTELAB to determine
// whether to compute the stellar aberration correction
// velocity analytically or numerically. The numerical
// branch is taken when the separation angle is less than
// NUMLIM.
//
//
// Tolerance level that can be used with DE-418 on PC/Linux/g77
// platform: 5.D-8
//
//
// Tolerance level that can be used with DE-418 on PC/Linux/g77
// platform: 5.D-8
//
//
// Local Variables
//
// Begin every test family with an open call.
//
testutil::TOPEN(b"F_ZZSTELAB", ctx)?;
//
// We're going to do all of our work in a reference frame that's
// not aligned with the standard basis. The basis vectors of our
// working frame will be called E1, E2, and E3.
//
spicelib::EUL2M(0.2, -0.3, 0.4, 1, 2, 3, RMAT.as_slice_mut(), ctx)?;
spicelib::VEQU(RMAT.subarray([1, 1]), E1.as_slice_mut());
spicelib::VEQU(RMAT.subarray([1, 2]), E2.as_slice_mut());
spicelib::VEQU(RMAT.subarray([1, 3]), E3.as_slice_mut());
//
// We're going to work with an artificial ephemeris defined
// by a simple, analytic formula. There is an observer whose
// orbit is circular. The observer's orbit is centered at
// the origin of our frame, and the radius of the orbit is
// about that of the Earth's orbit. There is a target whose
// motion is either linear or which does not move.
//
// We'll let the observer's orbital radius be R and its
// orbital period be TAU. The orbital plane will be that
// spanned by E1 and E2. The observer's location at time T
// will be given by
//
// POS(T) = R * ( cos( W*T )*E1 + sin ( W*T )*E2 )
//
// where
//
// W = 2 * Pi / TAU
//
//
// The observer's velocity has the formula
//
// W * R * ( -sin( W*T )*E1 + cos( W*T )*E2 )
//
// and the observer's acceleration has the formula
//
// 2
// - W * R * ( cos( W*T )*E1 + sin( W*T )*E2 )
//
//
// Since we wish to avoid using time values too close to
// zero, we'll let the central epoch of each sequence of
// test samples be
//
// T0 = TAU / 6.
//
// At epoch TAU the observer is located at
//
// ( R/2, R*SQRT(3)/2, 0 )
//
// and is moving in the direction
//
// ( -R*SQRT(3)/2, R/2, 0 )
//
// For all target motion cases, we'll place the target at the point
// at distance 2*R from the observer along the observer's velocity
// vector at epoch T0. We'll call this location PTARG0.
//
R = 150000000.0;
TAU = spicelib::JYEAR();
W = (((2 as f64) * spicelib::PI(ctx)) / TAU);
T0 = (TAU / 6 as f64);
//
// Compute the observer and target positions at T0.
//
spicelib::VLCOM(
(R / 2.0),
E1.as_slice(),
((R * f64::sqrt(3.0)) / 2.0),
E2.as_slice(),
POBS0.as_slice_mut(),
);
spicelib::VLCOM(
-((R * f64::sqrt(3.0)) / 2.0),
E1.as_slice(),
(R / 2.0),
E2.as_slice(),
VOBS.as_slice_mut(),
);
spicelib::VHAT(VOBS.as_slice(), UVOBS0.as_slice_mut());
spicelib::VLCOM(
1.0,
POBS0.as_slice(),
((2 as f64) * R),
UVOBS0.as_slice(),
PTARG0.as_slice_mut(),
);
//
// For all of our test cases, we'll choose times such that the
// angular separation of the observer's velocity and the observer-
// target vector SEP passes through the set of values (units are
// radians):
//
// -1.D-5, -1.D-6, ..., -1.D-11, 0, 1.D-11, ..., 1.D5
//
// We'll store these values in the array ANGLES.
//
ANGLES[8] = 0.0;
for I in 1..=((NSAMP - 1) / 2) {
ANGLES[I] = -f64::powf(10.0, -(4.0 + I as f64));
ANGLES[((NSAMP + 1) - I)] = f64::powf(10.0, -(4.0 + I as f64));
}
for CN in 1..=NCASES {
//
// Use reception corrections for the odd-numbered cases;
// use transmission corrections for the even-numbered ones.
//
XMIT = spicelib::EVEN(CN);
//
// For the second set of cases, negate the observer's
// velocity and acceleration.
//
if (CN <= (NCASES / 2)) {
S = 1.0;
} else {
S = -1.0;
}
spicelib::RMAINI(CN, (NCASES / 2), &mut Q, &mut RM, ctx)?;
//
// For odd values of RM, we change the target's velocity.
// For even values we keep the geometry constant and use
// transmission corrections.
//
// Note that the 10th and 20th cases correspond to RM values
// of zero.
//
if (RM == 1) {
//
// Set the target's velocity to zero. The target rests at
// PTARG0.
//
spicelib::CLEARD(3, VTARG.as_slice_mut());
} else if (RM == 3) {
//
// Set the target's velocity to 30 km/s in the direction
// parallel to the observer's position vector (relative to the
// origin) at T0 (hence orthogonal to the observer's velocity
// and anti-parallel to the observer's acceleration).
//
spicelib::VHAT(PTARG0.as_slice(), UPOBS.as_slice_mut());
spicelib::VSCL(30.0, UPOBS.as_slice(), VTARG.as_slice_mut());
} else if (RM == 5) {
//
// Set the target's velocity to 30 km/s in the direction
// anit-parallel to the observer's position vector (relative
// to the origin) at T0 (hence orthogonal to the observer's
// velocity and anti-parallel to the observer's acceleration).
//
spicelib::VHAT(PTARG0.as_slice(), UPOBS.as_slice_mut());
spicelib::VSCL(-30.0, UPOBS.as_slice(), VTARG.as_slice_mut());
} else if (RM == 7) {
//
// Set the target's velocity to 30 km/s in the direction
// parallel to the observer's velocity vector (relative
// to the origin) at T0.
//
spicelib::VSCL(30.0, UVOBS0.as_slice(), VTARG.as_slice_mut());
} else if (RM == 9) {
//
// Set the target's velocity to 30 km/s in the direction
// anti-parallel to the observer's velocity vector (relative
// to the origin) at T0.
//
spicelib::VSCL(-30.0, UVOBS0.as_slice(), VTARG.as_slice_mut());
}
for SN in 1..=NSAMP {
//
//---- Case -------------------------------------------------------------
//
//
// Note: the TCASE call setting the test case title will
// be made AFTER we compute the separation angle; this
// angle will appear in the title.
//
fstr::assign(&mut TITLE, b"Case #; sample number #, separation angle #");
spicelib::REPMI(&TITLE.clone(), b"#", CN, &mut TITLE, ctx);
spicelib::REPMI(&TITLE.clone(), b"#", SN, &mut TITLE, ctx);
//
// The time increment TDELTA refers to the difference
//
// T - T0
//
// This difference is a function of the offset angle
//
// ANGLES(SN)
//
// When the target is motionless, the offset angle is very
// small, so the angle is primarily determined by the
// observer's velocity direction, which changes with angular
// velocity W. So we can approximate TDELTA by
//
// ANGLES(SN) / W
//
// When the target is moving, this approximation still is
// of the correct magnitude, so we'll use it for these
// cases as well.
//
TDELTA = (ANGLES[SN] / W);
T = (T0 + TDELTA);
//
// Compute the position, velocity, and acceleration of the
// observer relative to the solar system barycenter (that
// is, the origin of the frame).
//
spicelib::VLCOM(
(R * f64::cos((W * T))),
E1.as_slice(),
(R * f64::sin((W * T))),
E2.as_slice(),
POBS.as_slice_mut(),
);
spicelib::VLCOM(
-((W * R) * f64::sin((W * T))),
E1.as_slice(),
((W * R) * f64::cos((W * T))),
E2.as_slice(),
VOBS.as_slice_mut(),
);
spicelib::VLCOM(
-((f64::powi(W, 2) * R) * f64::cos((W * T))),
E1.as_slice(),
-((f64::powi(W, 2) * R) * f64::sin((W * T))),
E2.as_slice(),
ACC.as_slice_mut(),
);
//
// Adjust the signs of the velocity and acceleration.
//
spicelib::VSCLIP(S, VOBS.as_slice_mut());
spicelib::VSCLIP(S, ACC.as_slice_mut());
//
// Compute the target's position.
//
spicelib::VLCOM(
1.0,
PTARG0.as_slice(),
TDELTA,
VTARG.as_slice(),
PTARG.as_slice_mut(),
);
//
// Compute the target's state relative to the observer.
//
spicelib::VSUB(PTARG.as_slice(), POBS.as_slice(), STARG.as_slice_mut());
spicelib::VSUB(VTARG.as_slice(), VOBS.as_slice(), STARG.subarray_mut(4));
//
// If this case is supposed to be singular, make sure
// the observer's velocity is pointed directly toward
// or away from the target. Due to round-off errors,
// we cannot ensure that the angular separation of
// the observer's velocity and the observer-target
// position vector is exactly zero unless we play
// some dirty tricks.
//
if (SN == 8) {
if (spicelib::VDOT(VOBS.as_slice(), STARG.as_slice()) >= 0.0) {
spicelib::VEQU(VOBS.as_slice(), STARG.as_slice_mut());
} else {
spicelib::VMINUS(VOBS.as_slice(), STARG.as_slice_mut());
}
}
//
// Check the angular separation of the observer's velocity
// and the observer-target position vector.
//
SEP = spicelib::VSEP(VOBS.as_slice(), STARG.as_slice(), ctx);
spicelib::REPMD(&TITLE.clone(), b"#", SEP, 14, &mut TITLE, ctx);
testutil::TCASE(&TITLE, ctx)?;
// WRITE (*,*) '----------'
// WRITE (*,*) 'SN = ', SN
// WRITE (*,*) 'ANGLES(SN) = ', ANGLES(SN)
// WRITE (*,*) 'SEP = ', SEP
//
// Compute the stellar aberration offset and velocity.
//
spicelib::ZZSTELAB(
XMIT,
ACC.as_slice(),
VOBS.as_slice(),
STARG.as_slice(),
PCORR.as_slice_mut(),
DPCORR.as_slice_mut(),
ctx,
)?;
testutil::CHCKXC(false, b" ", OK, ctx)?;
// WRITE (*,*) '||DPCORR|| = ', VNORM(DPCORR)
// WRITE (*,*) '||PCORR|| = ', VNORM(PCORR)
if (((spicelib::PI(ctx) - SEP) > 0.000000000001) && (SEP > 0.000000000001)) {
//
// Compare the results to our analytic formulation.
//
testutil::T_ZZSTELAB(
XMIT,
ACC.as_slice(),
VOBS.as_slice(),
STARG.as_slice(),
PCORR2.as_slice_mut(),
DPCOR2.as_slice_mut(),
ctx,
)?;
testutil::CHCKXC(false, b" ", OK, ctx)?;
//
// Test the relative position error.
//
testutil::CHCKAD(
b"PCORR",
PCORR.as_slice(),
b"~~/",
PCORR2.as_slice(),
3,
0.0001,
OK,
ctx,
)?;
//
// Test the absolute position error.
//
testutil::CHCKAD(
b"PCORR",
PCORR.as_slice(),
b"~",
PCORR2.as_slice(),
3,
0.000000001,
OK,
ctx,
)?;
//
// Test the relative velocity error.
//
testutil::CHCKAD(
b"DPCORR",
DPCORR.as_slice(),
b"~~/",
DPCOR2.as_slice(),
3,
0.0000001,
OK,
ctx,
)?;
//
// Test the absolute velocity error.
//
testutil::CHCKAD(
b"DPCORR",
DPCORR.as_slice(),
b"~",
DPCOR2.as_slice(),
3,
0.000000001,
OK,
ctx,
)?;
}
if (((spicelib::PI(ctx) - SEP) < NUMLIM) || (SEP < NUMLIM)) {
//
// Compare the results to our numeric formulation.
// Ideally, we would expect EXACT matches, but
// on the PC-CYGWIN_C platform, we don't get them.
// So instead, look for small relative
// errors.
//
testutil::T_ZZSTLABN(
XMIT,
ACC.as_slice(),
VOBS.as_slice(),
STARG.as_slice(),
PCORR2.as_slice_mut(),
DPCOR2.as_slice_mut(),
ctx,
)?;
testutil::CHCKXC(false, b" ", OK, ctx)?;
//
// Test the relative position and velocity errors.
//
testutil::CHCKAD(
b"PCORR",
PCORR.as_slice(),
b"~~/",
PCORR2.as_slice(),
3,
MEDIUM,
OK,
ctx,
)?;
testutil::CHCKAD(
b"DPCORR",
DPCORR.as_slice(),
b"~~/",
DPCOR2.as_slice(),
3,
MEDIUM,
OK,
ctx,
)?;
}
}
//
// End of time loop.
//
}
//
// End of case loop.
//
testutil::T_SUCCESS(OK, ctx);
Ok(())
}