TDF-11 meta data for K.Elder formatted data

field#

field_name

description

Coded

note

1 jday Julian calendar day    Calendar begins 1200 Jan 01, 4713 BC
2 lat Latitude in decimal degrees   North positive and south negative
3 lon Longitude in decimal degrees   East positive, west negative
4 year Year    18xx-19xx 
5 month Month of the year    
6 day Day of the month    
7 hour Hour GMT   0000 GMT - 2300 GMT
8 wd_ind Wind direction indicator coded always NULL in ambrose file NULL= 36pt compass
9 w_dir Direction from which the wind is blowing coded 00-36, 99=variable
10 wsp_ind Wind speed indicator coded NULL = not measured, 0 = measured
11 w_sp Wind speed in knots   001-199 = 1 to 199 knots, 000 - Calm
12 vis_ind Visibility indicator coded NULL = not measured, 0 = measured, 1 = fog present
13 vis Horizontal surface visibility in kilometers 90-99 coded If vis_ind=1 and vis=93, Fog present but vis not rptd
14 pr_wthr Present weather - qualitative coded 00-99 
15 pa_wthr Past weather- qualitative coded 0-9
16 sl_press Sea level pressure in millibars    890.0-1070.0 millibars
17 t_ind Teperatures indicator 1, 3 or 5  coded Indicates measured in tenths, whole or half degrees C
18 t_air Air temperature   negative numbers originally overpunched
19 t_wb Wet bulb temperature   negative numbers originally overpunched
20 t_dp Dew point temperature   negative numbers originally overpunched
21 t_ss Sea surface temperature   negative numbers originally overpunched
22 t_asea Air-sea temperature difference negative numbers originally overpunched
23 cl_tot Total cloud amount coded Fraction of celestial dome cloud covered 0-9
24 wav_dir Direction from which waves come coded  
25 wav_p Period of waves coded  
26 wav_ht Height of waves in half m increments    
27 sw_dir Direction from which swell comes coded same code as wave direction
28 sw_p Period of swell coded same code as wave period < 1968, then code changes
29 sw_ht Height of waves in half m increments    
30 add_di Additional data indicator coded  
31 bar_tdcy Barometric Tendency coded qualitative 3hr press change
32 press_chg Amt. press. change from 3 hr earlier 0-29.9 millibars    
33 rel_hmd Relative humidity 0-100    last 5 fields supplemental - mostly NULL
34 iowb_ind Ice on wet bulb indicator    last 5 fields supplemental - mostly NULL
35 t_oind Original temperature indicator coded last 5 fields supplemental - mostly NULL
36 t_sind Sea temperature method indicator   last 5 fields supplemental - mostly NULL
37 wav_p Wave period in seconds 99=confused sea   last 5 fields supplemental - mostly NULL
38 low_cl_amt Total cloud amount coded Fraction of celestial dome cloud covered 0-9
39 low_cl_type Low cloud type 0-9,- coded  
40 cl_ht Height range above sea surf.lowest cloud coded 0-9
41 mcl_type Middle cloud type 0-9,- coded  
42 hcl_type High cloud type 0-9,- coded  

Return to Ambrose Channel lightship

Return to Barnegat lighship

Last Updated on 11/18/98
By Kathryn L. Elder