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METAR: mitigate wind sensor failures

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This commit is contained in:
Scott Giese 2020-11-20 21:13:47 -06:00
parent 15c6f73136
commit da39e30439
2 changed files with 30 additions and 6 deletions
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27
simgear/environment/metar.cxx
View File

@ -646,16 +646,21 @@ bool SGMetar::scanWind()
double gust = NaN;
if (*m == 'G') {
m++;
if (!scanNumber(&m, &i, 2, 3))
if (!strncmp(m, "//", 2)) // speed not measurable
m += 2, i = -1;
else if (!scanNumber(&m, &i, 2, 3))
return false;
gust = i;
if (i != -1)
gust = i;
}
double factor;
if (!strncmp(m, "KT", 2))
m += 2, factor = SG_KT_TO_MPS;
else if (!strncmp(m, "KMH", 3))
else if (!strncmp(m, "KMH", 3)) // invalid Km/h
m += 3, factor = SG_KMH_TO_MPS;
else if (!strncmp(m, "KPH", 3)) // ??
else if (!strncmp(m, "KPH", 3)) // invalid Km/h
m += 3, factor = SG_KMH_TO_MPS;
else if (!strncmp(m, "MPS", 3))
m += 3, factor = 1.0;
@ -680,18 +685,28 @@ bool SGMetar::scanVariability()
{
char *m = _m;
int from, to;
if (!scanNumber(&m, &from, 3))
if (!strncmp(m, "///", 3)) // direction not measurable
m += 3, from = -1;
else if (!scanNumber(&m, &from, 3))
return false;
if (*m++ != 'V')
return false;
if (!scanNumber(&m, &to, 3))
if (!strncmp(m, "///", 3)) // direction not measurable
m += 3, to = -1;
else if (!scanNumber(&m, &to, 3))
return false;
if (!scanBoundary(&m))
return false;
_m = m;
_wind_range_from = from;
_wind_range_to = to;
_grpcount++;
return true;
}

9
simgear/environment/test_metar.cxx
View File

@ -87,6 +87,15 @@ void test_sensor_failure_wind()
SGMetar m1("2020/10/23 16:55 LIVD 231655Z /////KT 9999 OVC025 10/08 Q1020 RMK OVC VIS MIN 9999 BLU");
SG_CHECK_EQUAL(m1.getWindDir(), -1);
SG_CHECK_EQUAL_EP2(m1.getWindSpeed_kt(), -1, TEST_EPSILON);
SGMetar m2("2020/10/21 16:55 LIVD 211655Z /////KT CAVOK 07/03 Q1023 RMK SKC VIS MIN 9999 BLU");
SG_CHECK_EQUAL(m2.getWindDir(), -1);
SG_CHECK_EQUAL_EP2(m2.getWindSpeed_kt(), -1, TEST_EPSILON);
SGMetar m3("2020/11/17 16:00 CYAZ 171600Z 14040G//KT 10SM -RA OVC012 12/11 A2895 RMK NS8 VIA CYXY SLP806 DENSITY ALT 900FT");
SG_CHECK_EQUAL(m3.getWindDir(), 140);
SG_CHECK_EQUAL_EP2(m3.getWindSpeed_kt(), 40, TEST_EPSILON);
SG_CHECK_EQUAL_EP2(m3.getGustSpeed_kt(), SGMetarNaN, TEST_EPSILON);
}
void test_wind_unit_not_specified()