Station report
Split Mountain, 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 4,844 ft above sea level, 16 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 25.04 inHg and the temperature at 41.7 F.
Section from sea level of where Split Mountain stands in the atmosphere, height to scale: the station 4,844 feet above sea level with 16 per cent of the air below it; the standard atmosphere's pressure there, 25.04 inches of mercury, and temperature, 41.7 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 S2154 FIG. D WHERE SPLIT MOUNTAIN 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 SPLIT MOUNTAIN 16 PER CENT OF THE AIR BELOW IT 4,844 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 25.04 inHg STANDARD TEMPERATURE HERE 41.7 F TITLE Split Mountain, the column STATION REPORT · SCAN S2154 TYPE SECTION SCALE HEIGHT TO SCALE REV FROM THE REGISTER SHEET 1 of 3 DATE 2026-09-27 ID SR-S2154-1 DRAWN AS linework on paper SOURCES FB-ENG-001, FB-ENG-003 On Sep 27 the noon sun stands 48 degrees above the horizon at 40.39 N, and the day is 11 h 47 min long. Level ground there takes 74 per cent of the noon sunlight a surface facing the sun would.
Elevation of the noon sun at Split Mountain, angles true: on Sep 27 it stands 48 degrees above the horizon, against 73 at the June solstice, 50 at the equinoxes and 26 at the December solstice; the day is 11 h 47 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 S2154 FIG. E THE SUN AT SPLIT MOUNTAIN 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 73° EQUINOXES 50° DECEMBER SOLSTICE 26° SEP 27, 48° SOUTH ANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLY DAY LENGTH 11 H 47 MIN LEVEL GROUND TAKES 74 PER CENT OF THE NOON SUN A FACING SURFACE WOULD LATITUDE 40.39 N; THE SUN'S DECLINATION -1.9° TITLE Split Mountain, the sun STATION REPORT · SCAN S2154 TYPE ELEVATION SCALE ANGLES TRUE REV FROM THE REGISTER SHEET 2 of 3 DATE 2026-09-27 ID SR-S2154-2 DRAWN AS linework on paper SOURCES FB-ENG-007 A weather instrument, 4,844 ft above sea level. Its sensors, as its network builds them.
Elevation of the instrument, Split Mountain, 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 S2154 FIG. F THE INSTRUMENT ELEVATION OF THE INSTRUMENT, EACH SENSOR WITH WHAT IT READ ANTENNA, SENDING BY SATELLITE - AIR TEMPERATURE - PRECIPITATION GAUGE - SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALE TITLE Split Mountain, the instrument STATION REPORT · SCAN S2154 TYPE ELEVATION SCALE SCHEMATIC REV FROM THE REGISTER SHEET 3 of 3 DATE 2026-09-27 ID SR-S2154-3 DRAWN AS linework on paper SOURCES FB-INS-001 
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