COVER INFORMATION Station: VLBA_LA (Code La ) Experiment: 3mm observing with autopeak Exp. Code: BJ045J Schedule Version: 1.00 Processed by SCHED version: 6.05 June 2006 PI: Bill Junor Address: ISR-2 MS D436, Bikini Atoll Road Los Alamos, New Mexico, 87545 U.S.A. Phone: 505 667 0788 EMAIL: bjunor@lanl.gov Fax: 505 665 7395 Phone during observation: 505 699 7692 Observing mode: 3mm 512-8-2 Notes: Will use reference pointing. COVER LETTER: BJ045 SUMMARY: This project needs about 40 hours times 28 baselines to meet the sensitivity requirements. This time can be accumulated in many separated sessions but MK should appear in all sessions. Each session should be a full track with all antennas to set the calibration and ensure full uv coverage. Tropospheric weather is the problem for these 3mm observations. 3C274 is mostly a night-time object now. 2 tapes per station. -------------------------------------------------------------------- Here is the official dynamic scheduling sheet: ================================================================ Preferred Dynamic Contraints. Alter [defaults] as desired. ================================================================ Equipment constraints: Stations. Below each station code, the "o" indicates an [optional] station that is to be used if it is available. Change "o" to "r" if the station is required or change "o" to "n" if the station is not to be used. SC HN NL FD LA PT KP OV BR MK n o o o o o o o n r Minimum number of stations [7]: May we swap PT for a single VLA antenna? [no] Consult http://www.aoc.nrao.edu/~gtaylor/y1gotcha.html to decide. If you adopt the default, then both PT and VLA1 must be in the stations list in the keyin file. Bands and polarizations. Below each band code, insert "R" if the righthand polarization is to be used, "L" if the lefthand polarization is to be used, "d" if dual polarizations are to be used, or "o" if the band is in your setups but scheduling should not be constrained by its availability. 90cm 50cm 20cm 13cm 6cm 4cm 2cm 1cm 7mm 3mm d Weather constraints: [appropriate for bands marked "L", "R", or "d" above and for at least the minimum number of stations] Best tropospheric conditions for 3mm. Date constraints: Preferred date(s), usually a series start [none]: Excluded dates plus reason [none]: Preferred interval between segments in days [none]: Special conditions (e.g., a series with different spacings in time) [See the comments at the top.]: Must include MK Schedule for VLBA_LA (Code La ) Page 2 3mm observing with autopeak UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Wed 17 Jan 2007 Day 17 --- Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 07 57 01 3C273 08 37 30 26.8 108.4 -3.9 -50.4 0 1 1 0 Stopped 08 02 00 --- 08 42 30 27.7 109.3 -3.8 -50.0 299 S 1 0 Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 08 02 30 3C273 08 43 00 27.8 109.3 -3.8 -50.0 25 1 1 0 08 02 30 08 08 29 --- 08 49 00 29.0 110.4 -3.7 -49.5 359 F 1 23 08 02 48 08 10 29 3C274 08 51 00 35.4 100.9 -3.7 -54.7 101 1 1 23 08 10 29 08 21 27 --- 09 02 00 37.6 102.8 -3.5 -54.1 658 F 1 66 08 10 47 08 21 57 3C274 09 02 30 37.7 102.9 -3.5 -54.1 25 1 1 66 08 21 57 08 32 55 --- 09 13 30 39.8 104.9 -3.3 -53.4 658 F 1 108 08 22 15 08 34 55 3C274 09 15 30 40.2 105.3 -3.3 -53.2 113 1 1 108 08 34 55 08 45 53 --- 09 26 30 42.4 107.5 -3.1 -52.4 658 F 1 151 08 35 13 Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 08 46 23 3C273 09 27 00 36.0 118.0 -3.0 -45.8 11 1 1 151 Stopped 08 51 22 --- 09 32 00 36.9 119.1 -3.0 -45.2 299 S 1 151 Schedule for VLBA_LA (Code La ) Page 3 3mm observing with autopeak UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Wed 17 Jan 2007 Day 17 --- Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 08 51 52 3C273 09 32 30 37.0 119.2 -2.9 -45.1 25 1 1 151 08 51 52 08 57 51 --- 09 38 30 38.0 120.6 -2.8 -44.4 359 F 1 174 08 52 10 08 59 51 3C274 09 40 30 45.0 110.4 -2.8 -51.1 100 1 1 174 08 59 51 09 10 49 --- 09 51 30 47.1 112.9 -2.7 -49.9 658 F 1 216 09 00 09 09 11 19 3C274 09 52 00 47.2 113.0 -2.7 -49.9 25 1 1 216 09 11 19 09 22 17 --- 10 03 00 49.3 115.6 -2.5 -48.5 658 F 1 259 09 11 37 09 24 17 3C274 10 05 00 49.6 116.1 -2.4 -48.2 113 1 1 259 09 24 17 09 35 15 --- 10 16 00 51.6 119.0 -2.3 -46.6 658 F 1 301 09 24 35 Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 09 35 45 3C273 10 16 30 44.3 130.0 -2.2 -38.4 9 1 1 301 Stopped 09 40 44 --- 10 21 30 45.1 131.4 -2.1 -37.5 299 S 1 301 Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 09 41 14 3C273 10 22 00 45.2 131.5 -2.1 -37.4 25 1 1 301 09 41 14 09 47 13 --- 10 28 00 46.1 133.3 -2.0 -36.2 359 F 1 324 09 41 32 09 49 13 3C274 10 30 00 54.0 123.0 -2.0 -44.2 98 1 1 324 09 49 13 10 00 11 --- 10 41 00 55.9 126.4 -1.8 -42.0 658 F 1 367 09 49 31 Schedule for VLBA_LA (Code La ) Page 4 3mm observing with autopeak UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Wed 17 Jan 2007 Day 17 --- 10 00 41 3C274 10 41 30 55.9 126.5 -1.8 -41.9 25 1 1 367 10 00 41 10 11 39 --- 10 52 30 57.7 130.3 -1.6 -39.3 658 F 1 409 10 00 59 10 13 39 3C274 10 54 30 58.0 131.0 -1.6 -38.8 113 1 1 409 10 13 39 10 24 37 --- 11 05 30 59.6 135.1 -1.4 -35.9 658 F 1 452 10 13 57 Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 10 25 07 3C273 11 06 00 51.1 145.5 -1.4 -27.4 7 1 1 452 Stopped 10 30 06 --- 11 11 00 51.7 147.3 -1.3 -26.0 299 S 1 452 Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 10 30 36 3C273 11 11 30 51.7 147.4 -1.3 -25.9 25 1 1 452 10 30 36 10 36 35 --- 11 17 30 52.3 149.6 -1.2 -24.2 359 F 1 475 10 30 54 10 38 34 3C274 11 19 30 61.5 140.9 -1.2 -31.6 95 1 1 475 10 38 34 10 49 33 --- 11 30 30 62.9 145.9 -1.0 -27.8 658 F 1 517 10 38 52 10 50 03 3C274 11 31 00 62.9 146.1 -1.0 -27.6 25 1 1 517 10 50 03 11 01 01 --- 11 42 00 64.1 151.6 -0.8 -23.3 658 F 1 560 10 50 21 11 03 00 3C274 11 44 00 64.3 152.6 -0.8 -22.5 113 1 1 560 11 03 00 11 13 59 --- 11 55 00 65.2 158.5 -0.6 -17.7 658 F 1 602 11 03 18 Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 11 14 29 3C273 11 55 30 55.3 165.0 -0.6 -12.2 4 1 1 602 Stopped 11 19 28 --- 12 00 30 55.6 167.1 -0.5 -10.4 299 S 1 602 Schedule for VLBA_LA (Code La ) Page 5 3mm observing with autopeak UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Wed 17 Jan 2007 Day 17 --- Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 11 19 58 3C273 12 01 00 55.6 167.3 -0.5 -10.3 25 1 1 602 11 19 58 11 25 57 --- 12 07 00 55.8 170.0 -0.4 -8.1 359 F 1 625 11 20 16 11 27 56 3C274 12 09 00 66.0 166.5 -0.4 -11.1 93 1 1 625 11 27 56 11 38 55 --- 12 20 00 66.4 173.1 -0.2 -5.7 658 F 1 668 11 28 14 11 39 24 3C274 12 20 30 66.5 173.4 -0.2 -5.4 25 1 1 668 11 39 24 11 50 23 --- 12 31 30 66.6 180.2 0.0 0.2 658 F 1 710 11 39 42 11 52 22 3C274 12 33 30 66.6 181.4 0.0 1.2 113 1 1 710 11 52 22 12 03 21 --- 12 44 30 66.4 188.1 0.2 6.7 658 F 1 753 11 52 40 Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 12 03 50 3C273 12 45 00 56.0 187.0 0.3 5.6 3 1 1 753 Stopped 12 08 50 --- 12 50 00 55.9 189.2 0.3 7.4 299 S 1 753 Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 12 09 20 3C273 12 50 30 55.9 189.4 0.4 7.6 25 1 1 753 12 09 20 12 15 19 --- 12 56 30 55.7 192.0 0.5 9.7 359 F 1 776 12 09 38 12 17 18 3C274 12 58 30 65.8 196.4 0.5 13.6 93 1 1 776 12 17 18 12 28 16 --- 13 09 30 65.0 202.6 0.6 18.6 658 F 1 818 12 17 36 Schedule for VLBA_LA (Code La ) Page 6 3mm observing with autopeak UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Wed 17 Jan 2007 Day 17 --- 12 28 46 3C274 13 10 00 65.0 202.9 0.6 18.9 25 1 1 818 12 28 46 12 39 45 --- 13 21 00 64.0 208.7 0.8 23.5 658 F 1 861 12 29 04 12 41 44 3C274 13 23 00 63.8 209.7 0.9 24.3 113 1 1 861 12 41 44 12 52 42 --- 13 34 00 62.6 215.1 1.0 28.5 658 F 1 903 12 42 02 Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 12 53 12 3C273 13 34 30 53.0 207.7 1.1 22.2 5 1 1 903 Stopped 12 58 12 --- 13 39 30 52.5 209.6 1.2 23.7 299 S 1 903 Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 12 58 41 3C273 13 40 00 52.5 209.8 1.2 23.8 25 1 1 903 12 58 41 13 04 40 --- 13 46 00 51.9 212.0 1.3 25.5 359 F 1 926 12 58 59 13 06 40 3C274 13 48 00 60.9 221.3 1.3 33.2 96 1 1 926 13 06 40 13 17 38 --- 13 59 00 59.3 225.7 1.5 36.5 658 F 1 969 13 06 58 13 18 08 3C274 13 59 30 59.3 225.9 1.5 36.6 25 1 1 969 13 18 08 13 29 06 --- 14 10 30 57.6 229.9 1.7 39.5 658 F 1 1011 13 18 26 13 31 06 3C274 14 12 30 57.3 230.6 1.7 40.0 113 1 1 1011 13 31 06 13 42 04 --- 14 23 30 55.5 234.3 1.9 42.4 658 F 1 1054 13 31 24 Next scan frequencies: 43115.99 43115.99 43215.99 43215.99 Next BBC frequencies: 715.99 715.99 815.99 815.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 13 42 34 3C273 14 24 00 47.1 224.7 1.9 34.8 7 1 1 1054 Stopped 13 47 33 --- 14 29 00 46.4 226.2 2.0 35.8 299 S 1 1054 Schedule for VLBA_LA (Code La ) Page 7 3mm observing with autopeak UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. For disks, the footages are really the GBytes TPStart: Tape motion start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Wed 17 Jan 2007 Day 17 --- Next scan frequencies: 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 Next BBC frequencies: 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 13 48 03 3C273 14 29 30 46.3 226.3 2.0 35.9 25 1 1 1054 13 48 03 13 54 02 --- 14 35 30 45.4 228.0 2.1 37.1 359 F 1 1077 13 48 21 13 56 02 3C274 14 37 30 53.2 238.5 2.1 45.1 98 1 1 1077 13 56 02 14 07 00 --- 14 48 30 51.2 241.6 2.3 46.9 658 F 1 1119 13 56 20 14 07 30 3C274 14 49 00 51.1 241.7 2.3 47.0 25 1 1 1119 14 07 30 14 18 28 --- 15 00 00 49.1 244.5 2.5 48.6 658 F 1 1162 14 07 48 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/filehost/cwalker/sched/setups/pt7mm.set Matches group v7mm_c8 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 13 Station: VLBA_LA Total bit rate: 256 Format: NONE Bits per sample: 2 Sample rate: 32.000 Number of channels: 4 Setup not used for recording data. 1st LO= 42400.00 42400.00 42400.00 42400.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = A C A C VLBA FE= 7mm omit 7mm omit VLBA Synth= 15.4 7.6 11.6 The following frequency sets based on this setup were used. Frequency Set: 5 Setup file default. Used pcal sets: 1 LO sum= 43115.99 43115.99 43215.99 43215.99 BBC fr= 715.99 715.99 815.99 815.99 Bandwd= 16.000 16.000 16.000 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S2 S3 S4 OFF OFF OFF OFF PCALXB2= M1 M2 M3 M4 OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Setup file: v3mm-512-8-2.set Matches group v3mm_ff in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 5 Station: VLBA_LA Total bit rate: 512 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 8 Speedup factor: 1.00 Disk used to record data. 1st LO= 85500.00 85500.00 85500.00 85500.00 85500.00 85500.00 85500.00 85500.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = B D B D B D B D VLBA FE= omit 3mm omit 3mm VLBA Synth= 12.9 15.4 12.1 The following frequency sets based on this setup were used. Frequency Set: 12 Setup file default. Used pcal sets: 2 LO sum= 86212.49 86212.49 86228.49 86228.49 86244.49 86244.49 86260.49 86260.49 BBC fr= 712.49 712.49 728.49 728.49 744.49 744.49 760.49 760.49 Bandwd= 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 2 PCAL = OFF PCALXB1= S1 S2 S3 S4 S5 S6 S7 S8 PCALXB2= M1 M2 M3 M4 M5 M6 M7 M8 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19, 66, 82, 67, 83 barrel=roll_off SOURCE LIST -- 3mm observing with autopeak Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) J1229+0203 12 26 33.245836 * 12 29 06.699732 12 29 29.008988 0.30 1226+023 02 19 43.30565 * 02 03 08.59815 02 00 41.37131 0.20 * 3C273 /home/filehost/cwalker/sched/catalogs/sources.vlba 3C273B VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro J1229+02 0.798 scan hours, 20.245 baseline hours above horizon. J1230+1223 12 28 17.569279 * 12 30 49.423381 12 31 11.596318 0.31 1228+126 12 40 01.74901 * 12 23 28.04383 12 20 57.46700 0.20 * 3C274 /home/filehost/cwalker/sched/catalogs/sources.vlba J1230+12 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 4.205 scan hours, 110.065 baseline hours above horizon. The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) 3C273 110.9 3C274 114.0 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg