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PTI V2 Data Products

PTI Observer's Log (.log) File

The KI observer's log is an ASCII file that contains both a seriesof automated entires in response to system events, and possiblyfree-form manual entries produced by the human observer.

Automated Entries

The log file has a number of automated entries. Reading in a new set ofobjects into the observation control GUI produces a report on the newobject set in the following format (examples taken from 99138.log):

2:59:34: New Starlist sent to Sequencer.HDC78418      9 08 47.330 +26 37 44.80   6.00  4.4 G5IV  xxx   xxxHDC79452      9 15 14.248 +34 38 00.65   6.00  3.8 G6III 8.12 0.77+...
Each successful star observation results in an automated observationrecord that has the following format:
 4:39:18: Star:   HDC118216 : Start:  4:33:22, Fringe:  4:36:24, Locks:   2/0130, HA: -1.02, Zenith: 13.0, V2:  0.386, Delay:  -504.40, Photons:   3025.7, BG:-5.06, SpecV2:  0.585, SpecPhotons:     35.3 4:44:36: Star:   HDC121107 : Start:  4:39:18, Fringe:  4:41:46, Locks:   1/0130, HA: -1.24, Zenith: 22.0, V2:  0.461, Delay:  -125.20, Photons:   2411.6, BG:-5.28, SpecV2:  2.207, SpecPhotons:      9.2...

Manual Entries

Manual entries are free-form and generally intended to be informative, e.g.:
 4:38:56: 4/18 MJK  beautiful clear night, no cloudsFirst fringes at 9:39 pmI didn't quite get to 75 Cnc in time...maybe I can get it tomorrow now that I'mback up to speed.

The file is created chronologically, so many instances of these types ofmessages will be interspersed.

The content of each summary observation line is as follows:

field#

content

comments
1

time

UTC Time (hh:mm:ss)
2

Star: target_name

The designation of the target (string)
3

Start: time

UTC time start of observation sequence (hh:mm:ss)
4

Fringe: time

UTC time fringe lock first acquired (hh:mm:ss)
5

Locks: number/time

lock counts/time (seconds)
6

HA: hourAngle

Hour angle (decimal hours)
8

Zenith: zenithAngle

Zenith angle (degrees)
9

V2: v2

Real-time FT wide-band visibility average (dimensionless)
10

Delay: delay

Delay position (m)
11

Photons: count

Wide-band photon count (DN units) (approx 5 photons/DN)
12

BG: background

Wide-band background value (DN units)
13

SpecV2: spectral visibility

Avg narrow-band incoherent V2 (dimensionless) (bogus due to bug)
14

SpecPhotons: count

Avg narrow-band photon count (DN units)