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                 ASTERIODAL OCCULTATION - REPORT FORM

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           	           EAON & IOTA-ES

               EUROPEAN ASTEROIDAL OCCULTATION NETWORK

    INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION

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1.DATE: 2011/07/07
  STAR: 2UCAC 27763093
  ASTEROID: (114) Kassandra

2.OBSERVER:
  	Name: Gerhard Dangl
	Phone: ++43-(0)2842-53908
	Address: AUSTRIA, A-3830, Nonndorf 12
	E-mail: gerhard@dangl.at

3.OBSERVING STATION:
	Nearest city: Waidhofen/Thaya
	Latitude:  N 48 47 13.5 (WGS84)
	Longitude: E 15 14 08.2 (WGS84)
	Altitude:  605m         (WGS84)
	Single/Multiple: Single

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4.TIMING OF EVENTS:
	Occultation recorded: POSITIVE
	Type of event:
	"S"tart observation; "I"nterrupt-"s"tart; "D"isappearance;
	"B"link; "F"lash; "E"nd observation; "I"nterrupt-"e"nd;
	"R"eappearance; "O"ther (specify)
	
	Personal Equation Substracted: No
	Event Time (UT)		P.E. Accuracy + Comments
	code: HH:MM:SS.ss      S.ss  S.ss
	
	S:    00:31:33

        D:    00:33:24.092 (+/- 0.32s)
        R:    00:33:32.412 (+/- 0.32s)    Duration 8.32s (+/- 0.64s)
                                          Mid time 00:33:28.252 (+/- 0.32s)

	E:    00:35:19     
	
5.TELESCOPE:
	Type: Newton
	Focal length: 1200mm
 	Aperture: 254 mm
	Magnification: video/primary focus/FOV 18.3'x13.7' (768x576, 1.43"x1.43" per pixel)
	Mount: Equatorial
	Motor drive: Yes

6.TIMING & RECORDING:
	Timekeeping: GPS 1PPS, GlobalSat EM-406A GPS Board + IOTA-VTI (P4) V1.1.40
        Sensor/Camera: WAT-120N, CCIR, 1/2" Sony CCD-Sensor ICX419ALL
	Mode of recording: It=640ms (1.5625 Img/s), Video CCIR, Y800, uncompressed AVI
	Device of recording: TIS DFG/USB2-lt Videograbber USB2.0 (Y800), Notebook Harddisk
        Time insertion: IOTA-VTI

7.OBSERVING CONDITIONS:
	Atmospheric transparency: fair
	Wind: No
	Star image stability: fair
	Minor planet visible: Yes
	Temperature: 285 Kelvin (+12 deg Celsius)
	
8.ADDITIONAL COMMENTS:
        Target star 2UCAC 27763093, +13.4mag, 29deg Elevation.

        Only Clear glass filter (Astronomik) for CCD protection was used.

        My first positve occultation result with the new IOTA-VTI device (Prototype P4).
        The recently developed IOTA-VTI device was presented first to the public in May 2011.

        Video evaluation accomplished with VirtualDub 1.9.7 and Tangra v1.3.0.409.

        Because of the use of a WAT-120N camera in integration mode frame16 (It=640ms)
        an additional correction of -350ms was made to the video inserted times according
        to the correction value table at:
        http://www.dangl.at/ausruest/vid_tim/vid_tim1.htm#wat_120n

        Predicted event time was 00:33:40 UTC for my observing position.
        Predicted maximum duration was 10.9 seconds with a 0.5mag drop.
        Position was 74km from predicted central line in NW direction
        between center line and path edge with a probability of 55.5%.
        Occultation event with a duration of 8.32s detected (It=640ms).
        
        3-D Position and timing
	GlobalSat EM-406A GPS Board inside of the IOTA-VTI
        Receiving 07 satellites
        Horizontal Dilution of Precision 1.2
        Geoidal separation 44.6m (Altitude 560.4MSL + 44.6 = 594.4 m in WGS84 datum)

        Gerhard Dangl
        gerhard@dangl.at
        www.dangl.at/
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