*27* (Con’t)
CC 30-33 DRY BULB TEMPERATURE (XXX.x). ALL REQUIRED WEATHER INFORMATION CAN BE FOUND ON THE METEOROLOGICAL DATA PORTION OF THE OBSERVER'S FIELD LOG. IT IS IMPORTANT TO MAKE SURE YOU ARE ENTERING DATA FOR THE CORRECT SESSION (BEGINNING AND ENDING READINGS).
CC 34 DRY BULB TEMPERATURE CODE (C/F). THE TEMPERATURE GIVEN MUST BE RECORDED IN CELSIUS OR FAHRENHEIT. NGS PREFERS CELSIUS.
CC 35-38 WET BULB TEMPERATURE (XXX.x). SEE DRY BULB TEMPERATURE.
CC 39 WET BULB TEMPERATURE CODE (C/F). SEE DRY BULB TEMPERATURE CODE.
CC 40-42 RELATIVE HUMIDITY (XX.x). ENTER THE PERCENTAGE OF RELATIVE HUMIDITY AT THE BEGINNING AND END OF THE SESSION.
CC 43-48 BAROMETRIC PRESSURE (XXXX.xx). (AT INITIATION AND COMPLETION) (ALLOWABLE UNITS MM, MB OR IN) THE BAROMETRIC PRESSURE CAN ALSO BE FOUND IN THE OBSERVER’S FIELD LOG.
CC 49-50 BAROMETRIC PRESSURE CODE. (MM, MB, IN) NGS PREFERS MB.
MM - MILLIMETERS OF MERCURY
CC 51-55 WEATHER CODE. THE FIRST COLUMN OF THIS CODE (51) IS A PROBLEM INDICATOR FOLLOWED BY VISIBILITY, TEMPERATURE, CLOUD COVER AND WIND INDICATORS IN SUCCESSION. FOR INFORMATION CONCERNING THE WEATHER CODE TO BE USED IN CONNECTION WITH GEOMETRIC OBSERVATIONS, SEE CHAPTER 2, PAGES 2-10.