Station report
Guanica 0.9 WNW, in 3 sheets Drawn from the register, in the manner of the Field Book, and opened beside the plates that explain each part of it.
1 The column2 The sun3 The instrumentAt 172 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.74 inHg and the temperature at 58.4 F.
Section from sea level of where Guanica 0.9 WNW stands in the atmosphere, height to scale: the station 172 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.74 inches of mercury, and temperature, 58.4 degrees Fahrenheit. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT PR-GC-2 FIG. D WHERE GUANICA 0.9 WNW STANDS IN THE ATMOSPHERE SECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHERE FT ABOVE SEA LEVEL 0 5,000 10,000 15,000 SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERE GUANICA 0.9 WNW 1 PER CENT OF THE AIR BELOW IT 172 FT 10 PER CENT OF THE AIR BELOW, 2,890 FT 20 PER CENT OF THE AIR BELOW, 6,050 FT 30 PER CENT OF THE AIR BELOW, 9,540 FT 40 PER CENT OF THE AIR BELOW, 13,470 FT STANDARD PRESSURE HERE 29.74 inHg STANDARD TEMPERATURE HERE 58.4 F TITLE Guanica 0.9 WNW, the column STATION REPORT · COCORAHS PR-GC-2 TYPE SECTION SCALE HEIGHT TO SCALE REV FROM THE REGISTER SHEET 1 of 3 DATE 2026-10-11 ID SR-PRGC2-1 DRAWN AS linework on paper SOURCES FB-ENG-001, FB-ENG-003 On Oct 11 the noon sun stands 65 degrees above the horizon at 17.97 N, and the day is 11 h 41 min long. Level ground there takes 91 per cent of the noon sunlight a surface facing the sun would.
Elevation of the noon sun at Guanica 0.9 WNW, angles true: on Oct 11 it stands 65 degrees above the horizon, against 85 at the June solstice, 72 at the equinoxes and 49 at the December solstice; the day is 11 h 41 min long. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT PR-GC-2 FIG. E THE SUN AT GUANICA 0.9 WNW ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUE THE STATION JUNE SOLSTICE 85° EQUINOXES 72° DECEMBER SOLSTICE 49° OCT 11, 65° SOUTH ANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLY DAY LENGTH 11 H 41 MIN LEVEL GROUND TAKES 91 PER CENT OF THE NOON SUN A FACING SURFACE WOULD LATITUDE 17.97 N; THE SUN'S DECLINATION -7.2° TITLE Guanica 0.9 WNW, the sun STATION REPORT · COCORAHS PR-GC-2 TYPE ELEVATION SCALE ANGLES TRUE REV FROM THE REGISTER SHEET 2 of 3 DATE 2026-10-11 ID SR-PRGC2-2 DRAWN AS linework on paper SOURCES FB-ENG-007 A community rain gauge, 172 ft above sea level. Its sensors, as its network builds them.
Elevation of a community rain gauge, Guanica 0.9 WNW, each sensor drawn and labelled with what it read: no reading in the last day. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT PR-GC-2 FIG. F THE INSTRUMENT ELEVATION OF A COMMUNITY RAIN GAUGE, EACH SENSOR WITH WHAT IT READ 4 INCH RAIN GAUGE, READ EACH MORNING - SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALE TITLE Guanica 0.9 WNW, the instrument STATION REPORT · COCORAHS PR-GC-2 TYPE ELEVATION SCALE SCHEMATIC REV FROM THE REGISTER SHEET 3 of 3 DATE 2026-10-11 ID SR-PRGC2-3 DRAWN AS linework on paper SOURCES FB-INS-001, FB-INS-003 
FB-ENG-001, Fig. AAtmosphere in section
FB-ENG-003, Fig. CHydrostatic balance
FB-ENG-007, Fig. ARadiation budget
FB-INS-001, Fig. AWhat an instrument is
FB-INS-003, Fig. BPersonal weather station