1
|
AP
|
all
|
Missing Airport: CGI
|
|
|
2
|
AP
|
all
|
Missing Airport: ESN
|
|
|
3
|
AP
|
all
|
Missing Airport: FTG
|
|
|
4
|
AP
|
all
|
Missing Airport: GKY
|
|
|
5
|
AP
|
all
|
Missing Airport: GLS
|
|
|
6
|
AP
|
all
|
Missing Airport: GTR
|
|
|
7
|
AP
|
all
|
Missing Airport: GYH
|
|
|
8
|
AP
|
all
|
Missing Airport: HXD
|
only incident has no time associated
|
observation will be dropped
|
9
|
AP
|
all
|
Missing Airport: JST
|
|
|
10
|
AP
|
all
|
Missing Airport: MER
|
|
|
11
|
AP
|
all
|
Missing Airport: MYV
|
|
|
12
|
AP
|
all
|
Missing Airport: OMN
|
note, airport closed
|
|
13
|
AP
|
all
|
Missing Airport: SPG
|
|
|
14
|
AP
|
all
|
Missing Airport: UCA
|
|
|
15
|
AP
|
all
|
Missing Airport: VBG
|
|
|
16
|
AP
|
all
|
Missing Airport: VCV
|
|
|
17
|
AP
|
ALL
|
definitions of the variables
|
Many of the variables, while having a plain-text definition, do not indicate how they were gathered (e.g., What is a "short taxi"), over how long (e.g., average rainy days)
|
Request clarification from FAA;
|
18
|
AP
|
geo_bullseye_flag
|
definitions of the variables
|
|
More than 2 taxiways intersecting in the same area
|
19
|
AP
|
geo_mult_rwy_crossing_flag
|
definitions of the variables
|
|
Does pilot have to cross multiple rwys to get to a departure rwy
|
20
|
AP
|
geo_num_hotspot
|
definitions of the variables
|
|
This information is in the airport diagram charts (Marked as "HS 1", "HS 2", etc.)
|
21
|
AP
|
geo_num_rsa_isect
|
definitions of the variables
|
|
Use the standard definition for the Runway Safety Area to determine whether there is intersection (1000ft at approach and departure ends).
|
22
|
AP
|
geo_num_taxi_x_runway
|
definitions of the variables
|
|
In this case, count the number of taxiways that cross more than 2 runways
|
23
|
AP
|
geo_rwy_close_flag
|
definitions of the variables
|
|
Again, there is no "definitive" criteria in the CAST report. This applies to cases where the rwys are NOT parallel, but there is still a possibility for confusion (e.g., I'm assigned to land on rwy 35, but I land on rwy 4, b/c the rwy ends are very close. (E.g., see HUT hotspot #2). Suggested criteria: (a) rwy intersection angle less than 50 degrees, and (b) both rwy ends within 500 ft of the intersection point
|
24
|
AP
|
geo_rwy_crossing_flag
|
definitions of the variables
|
|
Does pilot have to cross a rwy to get to a departure rwy? Basically the answer is "No" if you have only 1 runway (or, if you have more than 1 rwy but NO twy crosses any rwy).
|
25
|
AP
|
geo_rwy_num_isect
|
definitions of the variables
|
|
use as is
|
26
|
AP
|
geo_rwy_num_t_isect
|
definitions of the variables
|
|
use as is
|
27
|
AP
|
geo_rwy_parallel_flag
|
definitions of the variables
|
|
are there parallel runways (these can be determined w/o an airport diagram by looking at the rwy numbers, eg., 26R / 26L)
|
28
|
AP
|
geo_taxi_short_flag
|
definitions of the variables
|
|
Could not get any information. Suggest taking a sample of all airports for which this item is flagged, then of the sample, use the greatest observed value as our value? F26
|
29
|
AP
|
lahso_flag_ap
|
definitions of the variables
|
|
use as is
|
30
|
AP
|
locid
|
definitions of the variables
|
|
use as is
|
31
|
AP
|
runway information
|
KWA
|
need to manually pull
|
|
32
|
AP
|
runway information
|
PFN
|
need to manually pull
|
|
33
|
AP
|
runway information
|
OMN
|
need to manually pull (NOTE: 5010 contains information for an airport that has taken over the code)
|
|
34
|
AP
|
traffic variables
|
One airport sums to 111%
|
operations percenages at Kalaeloa Airport (JRF) sum to 111%
|
|
35
|
AP
|
weather variables
|
combined weather stations
|
Many airports in a region seem to share weather data, even if they are not correct (e.g., Hyannis, MA and Lawrance, MA)
|
|
36
|
AP
|
|
15 airports not included in dataset that are in RI
|
|
|
37
|
OE
|
acft_evas_actn_code
|
27 missing values
|
Replaced missing with unknown
|
|
38
|
OE
|
acft_gnd_spd_kt_qty
|
1133 missing values
|
codebook (but not in data) contains ACFT_GND_SPD_UNKN_FLAG, is this "Y" for these 1133?
|
will treat missing as unkown
|
39
|
OE
|
acft_model_desc
|
odd naming conventions
|
used in forming aircraft groups. No longer needed in database. Keeping issue open to grouping is completed
|
|
40
|
OE
|
acft_obstn_code
|
Missing values and "0" coded values
|
What does missing mean? Also, the codebook has no definition of "0" but it appears 174 times. Note: of the zeroes, 18 have descriptions of obstructions
|
The valid obstructions themselves have little useful information, will treat as a "demographic" variable and move on
|
41
|
OE
|
acft_phase_code
|
17 missing values
|
12 missing do not have descriptions. The variable in general agrees with phaseofflight. Letting the 12 missing stay missing.
|
|
42
|
OE
|
acft_tcas_equip_code
|
21 missing values
|
|
variable dropped
|
43
|
|
|
|
|
|
44
|
OE
|
ctlr_actn_contem_code
|
Incorrect coding
|
one value coded as "X", presumed to be a "Y"
|
variable dropped
|
45
|
OE
|
ctlr_actn_contem_code
|
missing
|
440 missing
|
variable dropped
|
46
|
OE
|
ctlr_actn_taken_code
|
missing
|
10 missing, same as ctlr_alert_code
|
variable dropped
|
47
|
OE
|
ctlr_alert_code
|
missing
|
6 missing do not have description. Demographic only variable, letting the 6 be missing
|
|
48
|
OE
|
ctlr_alert_otr_desc
|
missing
|
1336 missing, equal to those in ctlr_alert_code that are not "other"
|
|
49
|
OE
|
ctlr_area_spl_code
|
unclear meanings/codings
|
It's unclear what this variable is capturing in the first place, as sometimes this appears to list facilities (tower), locations (southwest), positions (LC1), areas (Area 7), or just a single number (6). There are 144 unique values in this field (though some are clearly the same with different abbreviations)
|
Data too inconsistent to use. Variable dropped
|
50
|
OE
|
ctlr_asst_req_flag
|
Y,N,Missing
|
27 Y, 12 missing, 1465 N
|
variable dropped
|
51
|
OE
|
ctlr_aware_dvlp_flag
|
Y,N,Missing
|
258 Y, 10 Missing, 1236 N
|
variable dropped
|
52
|
OE
|
ctlr_birth_date
|
Missing
|
479 Missing
|
199 missing in relevant data set, may have to exclude from some samples; recode one impossible value is missing, others over 61 are likely "grandfathered" in
|
53
|
OE
|
ctlr_certif_date
|
Missing
|
457 missing, a few wrong entires (7 years before birth, 2 years after birth). No entires prior to 1980, many certified 40+ years after birth
|
185 missing in relevant data set, significant followup needed
|
54
|
OE
|
ctlr_certif_type_ncode_oe
|
unclear meanings/codings
|
initial vs recerficiation?
|
"Controllers are initially certified. In pre-ATSAP days, certification could be revoked after an operational error (on one or all positions). Then recertification was required. Today, many events that might have required decertification are not (and instead handled via ATSAP process). " May have to take certifs "as is"
|
55
|
OE
|
ctlr_contrib_code
|
result of one-to-many merge
|
appears to have been a one-to-many merge from OE events to contributing factor codes, as a result, events appear in the db multiple times (i.e., once for each contributing code). We are not using the code in our model, so have dropped the field and removed duplicate lines
|
|
56
|
OE
|
ctlr_contrib_prev_30mo_qty
|
Missing
|
This is mutually exclusive with ctlr_prim_prev_30_mo_qty_oe. Treat missing as missing
|
|
57
|
OE
|
ctlr_curr_shft_end_time
|
Missing
|
456 missing
|
184 mising in relevant set, may have to exclude from some regressions
|
58
|
OE
|
ctlr_curr_shft_start_time
|
Missing
|
456 missing, same records missing as end time
|
184 mising in relevant set, may have to exclude from some regressions
|
59
|
OE
|
ctlr_dstrctn_flag
|
Y,N,Missing
|
200 Y, 15 Missing, 1289 N
|
variable dropped
|
60
|
OE
|
ctlr_fctr_med_certif_flag
|
Y,N,Missing
|
3 Y, 351 missing, 1150 N. may not be useful with so few Y
|
variable dropped
|
61
|
OE
|
ctlr_fpl_date
|
Missing
|
627 missing. The 4digit dates presented make no sense.
|
request clarification
|
62
|
OE
|
ctlr_perl_code
|
Missing
|
449 missing
|
181 missing in relevant data set, will have to exclude some
|
63
|
OE
|
ctlr_prev_shft_end_time
|
Missing
|
598 missing. 454 missing current end time. 2 missing current but have previous. 144 miss previous but have current
|
297 missing in relevant data set, will have to exclude those (plus "N/A" from some analysis)
|
64
|
OE
|
ctlr_prev_shft_start_time
|
Missing
|
598 missing, same missing as prev end time. 454 missing current start time. 2 missing current but have previous. 144 miss previous but have current
|
297 missing in relevant data set, will have to exclude those (plus "N/A" from some analysis)
|
65
|
OE
|
ctlr_prim_prev_30mo_qty
|
missing
|
528 missing
|
259 missing in relevant data set, need to understand relationship to contrib 30 month variable
|
66
|
OE
|
ctlr_psn_comb_desc
|
Missing
|
27 Missing. May require additional parsing to collapse in a usable categorical variable. Currently 642 unqiue values
|
will use the RI database instead, variable dropped
|
67
|
OE
|
ctlr_psn_fnctn_otr_desc
|
Missing
|
1464 Missing. Will need to parse better. 27 unique values
|
looks like people mistook this field for the "combined positions" description. Will drop variable
|
