Station report
Spadra Creek at Clarksville, 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 348 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.55 inHg and the temperature at 57.8 F.
Section from sea level of where Spadra Creek at Clarksville stands in the atmosphere, height to scale: the station 348 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.55 inches of mercury, and temperature, 57.8 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 07256500 FIG. D WHERE SPADRA CREEK AT CLARKSVILLE 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 SPADRA CREEK AT CLARKSVILLE 1 PER CENT OF THE AIR BELOW IT 348 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 29.55 inHg STANDARD TEMPERATURE HERE 57.8 F TITLE Spadra Creek at Clarksville, the column STATION REPORT · DCP 07256500 TYPE SECTION SCALE HEIGHT TO SCALE REV FROM THE REGISTER SHEET 1 of 3 DATE 2026-10-06 ID SR-07256500-1 DRAWN AS linework on paper SOURCES FB-ENG-001, FB-ENG-003 On Oct 6 the noon sun stands 49 degrees above the horizon at 35.47 N, and the day is 11 h 30 min long. Level ground there takes 76 per cent of the noon sunlight a surface facing the sun would.
Elevation of the noon sun at Spadra Creek at Clarksville, angles true: on Oct 6 it stands 49 degrees above the horizon, against 78 at the June solstice, 55 at the equinoxes and 31 at the December solstice; the day is 11 h 30 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 07256500 FIG. E THE SUN AT SPADRA CREEK AT CLARKSVILLE 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 78° EQUINOXES 55° DECEMBER SOLSTICE 31° OCT 6, 49° SOUTH ANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLY DAY LENGTH 11 H 30 MIN LEVEL GROUND TAKES 76 PER CENT OF THE NOON SUN A FACING SURFACE WOULD LATITUDE 35.47 N; THE SUN'S DECLINATION -5.3° TITLE Spadra Creek at Clarksville, the sun STATION REPORT · DCP 07256500 TYPE ELEVATION SCALE ANGLES TRUE REV FROM THE REGISTER SHEET 2 of 3 DATE 2026-10-06 ID SR-07256500-2 DRAWN AS linework on paper SOURCES FB-ENG-007 A data collection platform, 348 ft above sea level. Its sensors, as its network builds them.
Elevation of a data collection platform, Spadra Creek at Clarksville, 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 07256500 FIG. F THE INSTRUMENT ELEVATION OF A DATA COLLECTION PLATFORM, EACH SENSOR WITH WHAT IT READ ANTENNA, SENDING BY SATELLITE - AIR TEMPERATURE - PRECIPITATION GAUGE - SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALE TITLE Spadra Creek at Clarksville, the instrument STATION REPORT · DCP 07256500 TYPE ELEVATION SCALE SCHEMATIC REV FROM THE REGISTER SHEET 3 of 3 DATE 2026-10-06 ID SR-07256500-3 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