Air Carrier Cargo (Freighter) Approaches
Log for December 1 - December 7, 2008


Summary of all air carrier cargo approach activity for this week
Type Count % of Total Average approaches per day Typical approaches on an active day
All approaches: 45 100% 6.43 10
ILS approaches over EDH: 28 62% 4 7
ILS over EDH in early a.m.: 14 31% 2 3

Distribution of crossing altitudes for ILS approaches, one data sample out of range (high) and not plotted at both locations.
Crossing altitudes


Date Time Flight Aircraflt
Type		Approach IAF
Altitude		 EDH
Ridge
Altitude		 EDH
Noise
Potential		 Notes
Dec. 1
Monday 		-- -- none No arrivals. Only ABX406 was planned, its flight apparently was canceled, possibly due to ground fog at Mather
Dec. 2
Tuesday 		03:36:30 UPS898 757-200southwest -- -- none Flew downwind/base/final south of US 50.
03:51:59UPS954757-200south----none
04:47:41UPS956757-200ILS6,7883,871low
05:18:22UPS958A300-600ILS6,4993,937lowLeveled briefly for IAF
16:21:49UPS2960757-200ILS6,5193,921lowMeasured 63.9 dBA at west ridge
16:29:40UPS2962757-200ILS6,5813,894lowMeasured 68.3 dBA at west ridge
17:21:50UPS2958A300-600ILS6,5523,829low
17:59:10ABX406767-200ILS7,9825,627low
18:36:32UPS2964757-200ILS6,5063,901lowLeveled briefly for IAF
20:00:53ABX1802DC-9-40north/ILS--3,839lowArrive from north (Portland departure), joined ILS over EDH west ridge
Dec. 3
Wednesday		03:06:01UPS898757-200southwest----none
03:47:36UPS954757-200south/ILS--2,667moderateVery unusual approach, looks like the crew missed the usual base-to-final turn.  Descended to 2,500 ft while northbound, didn't turn south of 50. Overflew EDH approximately level, very slight climb, did wide 180 turn to the left, intercepted locator course from north at US 50 after crossing Folsom.
04:22:51UPS956757-200ILS6,7424,954low~1,000 ft High over EDH
05:08:09UPS958A300-600ILS5,8273,806low
06:05:21ABX806767-200ILS6,6933,868low
11:03:27ABX1927767-200south----none
16:27:22UPS2960757-200ILS4,3273,526low to
moderate		Initial approach was low for altitude separation from a Beech Baron at 5,500 feet in the holding pattern on the ILS course. UPS2960tayed nearly level across EDH. Actual noise at CSD was low, about 63 dBA.
17:07:12UPS2958A300-600ILS4,0392,986low to
moderate		Also low, to separate from the Baron in the holding pattern, level across EDH. Actual noise at CSD was 66.7 dBA.
18:02:59ABX406767-200ILS6,5393,822lowActual noise at CSD was 63.8 dBA.
18:16:37UPS2964757-200ILS6,9754,127lowActual noise at CSD was 61.0 dBA
19:58:11ABX1802DC-9-40north----noneTurned southeast, then flew broad arc over Folsom Lake and Folsom. Averaged ~2,600 ft on Folsom overflight, Folsom noise could have been low to moderate.
Dec. 4
Thursday		03:04:49UPS2898757-200southwest----none
03:13:35GTI902747-200south----noneFirst international arrival observed, Atlas Air flight departed from Mexico City.
03:48:02UPS954757-200south----none
05:35:35UPS958A300-600ILS6,5063,868low
05:55:44ABX806767-200ILS6,6373,976low
06:34:17UPS956757-200ILS6,6703,950low
15:37:30UPS2960757-200ILS6,5163,868low
16:58:24UPS2958A300-600ILS8,6686,135lowHigh approach, diverted toward south after passing EDH Blvd, circled once to descend.
Measured 63.3 dBA at CSD
18:00:56ABX406767-200ILS6,6673,825low
20:07:12ABX1802DC-9-40north----none
Dec. 5
Friday		03:29:31ABX1927767-200southeast----none
03:48:00UPS954757-200south----none
04:29:54UPS956757-200ILS6,6403,885low
05:26:17UPS3958767-300ILS6,6833,953low
05:45:08ABX806767-200ILS7,7034,101low
16:41:53UPS2958A300-600ILS6,5123,858low
16:57:02SWQ802737-400ILS*8,9538,957low*Swift Air flight ran ILS at ~ 9,000 feet before descending over Sacramento County south of 50 for final approach.
17:54:07ABX406767-200ILS6,1553,238low to moderate
19:55:20ABX1802DC-9-40north----noneDescended early,delayed turning south until over Folsom Lake, overflew Folsom while level at ~2,900 feet.
20:15:35UPS897757-200ILS6,4993,835low
Dec. 6
Saturday		No record of air carrier cargo flight tracks:  Is this a data gap?
Dec. 7
Sunday		17:12:28UPS958757-200east----lowApproach was south of US 50, crossed slightly to north side at EDH Blvd interchange & tracked over Iron Point Rd in Folsom until crossing south of 50 near Oak Avenue Parkway.
17:54:55ABX1755767-200east/ILS*4,816*3,012low to moderate*Arrival from east, well south of Green Valley Rd when abeam CAMRR Joined ILS over EDH CSD.
23:29:14BSK121737-800east5,075*3,743*low*Miami Air arrival from east, entire approach past Shingle Springs and EDH was slightly south of US 50.
Approach was at extreme limit of minimall audibility from west ridge below ILS, 1.6 miles horizontally from the actual flight path.

For each approach a captured image of the overall approach track is linked to contents of the Approach column. For approaches over EDH a captured image of the approach track at the point of maximum noise exposure is linked to values in the Crossing Altitude column. In almost all cases this is the point of crossing the western ridge of El Dorado Hills, whose at a point whose elevation is approximately 1,100 feet. Crossing altitudes are MSL (relative to mean sea level), as reported in the WebTrak traces of flight paths. The approach of greatest interest for EDH noise issues is the ILS (Instrument Landing System) approach. For ILS approaches the flight track image linked to the Approach column shows the aircraft at the IAF (Initial Approach Fix). For approaches not crossing EDH the time cited is for an approximate point of closest approach to El Dorado Hills.

Color code for highlighting in the log table:          Early morning approach
(between 3:30 a.m. and about 6 a.m.)
        Noise potential for EDH at ridge was "none":
This approach did not overfly EDH.
Noise potential for EDH at ridge was "low":
Estimated Lmax around 70 dB or less, usually 65 to 70
          Noise potential for EDH at ridge was "low to moderate":
Estimated Lmax around 75 dB plus or minus 5 dB
        Noise potential for EDH at ridge was "moderate":
Estimated Lmax around 80 dB plus or minus 5 dB
        Noise potential for EDH at ridge was "high":
Estimated Lmax around 85 dB or more

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