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resolved pressure constants 1013.2hPa != 29.92inHg

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This commit is contained in:
Mathew Sutcliffe
2013-08-18 17:29:37 +01:00
parent baa0ac147e
commit 5d4fcc8d40
3 changed files with 24 additions and 17 deletions
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24
src/blackmisc/pqconstants.h
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@@ -40,15 +40,35 @@ public:
}
/*!
* \brief Standard pressure 1013,25mbar / 29.92inHg
* \brief International Standard Atmosphere pressure at mean sea level, 1013.25hPa
* \return
*/
static const CPressure& InternationalStandardSeaLevelPressure()
static const CPressure& ISASeaLevelPressure()
{
static CPressure p(1013.25, CPressureUnit::hPa());
return p;
}
/*!
* \brief ICAO standard pressure datum for flight levels, 1013.2hPa
* \return
*/
static const CPressure& ICAOFlightLevelPressure()
{
static CPressure p(1013.2, CPressureUnit::hPa());
return p;
}
/*!
* \brief Standard pressure datum for flight levels in USA, Canada, parts of Latin America, 29.92inHg
* \return
*/
static const CPressure& USFlightLevelPressure()
{
static CPressure p(29.92, CPressureUnit::inHg());
return p;
}
/*!
* \brief Unicom frequency
* \return

13
src/blackmisc/pqunits.h
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@@ -627,17 +627,7 @@ public:
*/
static const CPressureUnit &inHg()
{
static CPressureUnit inhg(QT_TRANSLATE_NOOP("CMeasurementUnit", "inch of mercury 0C"), "inHg", false, 3386.389);
return inhg;
}
/*!
* \brief Inch of mercury for flight level 29,92inHg = 1013,25mbar = 1013,25hPa
* \return
*/
static const CPressureUnit &inHgFL()
{
static CPressureUnit inhg(QT_TRANSLATE_NOOP("CMeasurementUnit", "inch of mercury"), "inHg", false, 3386.5307486631);
static CPressureUnit inhg(QT_TRANSLATE_NOOP("CMeasurementUnit", "inch of mercury"), "inHg", false, 3386.389);
return inhg;
}
@@ -653,7 +643,6 @@ public:
u.append(CPressureUnit::bar());
u.append(CPressureUnit::hPa());
u.append(CPressureUnit::inHg());
u.append(CPressureUnit::inHgFL());
u.append(CPressureUnit::mbar());
u.append(CPressureUnit::psi());
}

4
tests/blackmisc/testphysicalquantities.cpp
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@@ -122,13 +122,11 @@ void CTestPhysicalQuantities::pressureTests()
{
CPressure p1(1013.25, CPressureUnit::hPa());
CPressure p2(29.92, CPressureUnit::inHg());
CPressure p3(29.92, CPressureUnit::inHgFL());
CPressure p4(p1);
p4.switchUnit(CPressureUnit::mbar());
// does not match exactly
QVERIFY2(p1 != p2, "Standard pressure test little difference");
QVERIFY2(p1 == p3, "Standard pressure test matching");
QVERIFY2(p1.unitValueToDouble() == p4.unitValueToDouble(), "mbar/hPa test");
}
@@ -195,7 +193,7 @@ void CTestPhysicalQuantities::memoryTests()
*/
void CTestPhysicalQuantities::basicArithmetic()
{
CPressure p1 = CPhysicalQuantitiesConstants::InternationalStandardSeaLevelPressure();
CPressure p1 = CPhysicalQuantitiesConstants::ISASeaLevelPressure();
CPressure p2(p1);
p2 *= 2.0;
CPressure p3 = p1 + p1;