From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 4 Mar 2015 21:21:30 -0500 Subject: Initial commit --- src/slalib/sun67.htx/node170.html | 111 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 src/slalib/sun67.htx/node170.html (limited to 'src/slalib/sun67.htx/node170.html') diff --git a/src/slalib/sun67.htx/node170.html b/src/slalib/sun67.htx/node170.html new file mode 100644 index 0000000..3f0f1a1 --- /dev/null +++ b/src/slalib/sun67.htx/node170.html @@ -0,0 +1,111 @@ + + + + +SLA_RVEROT - RV Corrn to Earth Centre + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_RVGALC - RV Corrn to Galactic Centre +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_REFZ - Apply Refraction to ZD +

+

+

SLA_RVEROT - RV Corrn to Earth Centre +   +

+
+
ACTION: +
Velocity component in a given direction due to Earth rotation. +
CALL: +
R = sla_RVEROT (PHI, RA, DA, ST) +

+

+
GIVEN: +
+
+ + + + + + + + + + + + + +
PHIRgeodetic latitude of observing station (radians)
RA,DARapparent $[\,\alpha,\delta\,]$ (radians)
STRlocal apparent sidereal time (radians)
+

+
RETURNED: +
+
+ + + + + +
sla_RVEROTRComponent of Earth rotation in +direction RA,DA (km s-1)
+

+
NOTES: +
+
1. +
Sign convention: the result is positive when the observatory +is receding from the given point on the sky. +
2. +
Accuracy: the simple algorithm used assumes a spherical Earth and + an observing station at sea level; for actual observing + sites, the error is unlikely to be greater than 0.0005 km s-1. + For applications requiring greater precision, use the routine + sla_PVOBS. +
+
+ +next + +up + +previous +
+ Next: SLA_RVGALC - RV Corrn to Galactic Centre +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_REFZ - Apply Refraction to ZD +

+

+

+SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk +
+ + -- cgit