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ExperimentUserTitleHF mode430Notes
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T3196EK: Elizabeth KendallISR Summer School--According to student's projects
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H3195VS: Vladimir Sotnikov/Herbert CarlsonTest for excitation of Lower Hybrid resonance effects by HF heating at Arecibo ObservatoryThe digitally controlled transmitter should simultaneously transmit two HF frequencies HFf1 and HFf2 where:

HFf1 always = 5.095 MHz,

HFf2 steps forward once each minute as in the table below:

One minute each on
f step
1kHz      5.095, 5.096, 5.097, 5.098, 5.099, 5.100, 5.101, 5.102, 5.103, HF OFF 

2kHz      5.095, 5.097, 5.099, 5.101, 5.103, 5.105, 5.107, 5.109, 5.111, HF OFF

4kHz      5.095, 5.099, 5.103, 5.107, 5.111, 5.115, 5.119, 5.123, 5.127, HF OFF


The PL and ion line. Dual beam, with most 430MHz power into the off vertical Gregorian for PL sensitivity just beyond the edge of the HF instability excited strong-echo return. I sounds like Gregorian at roughly 10.5Line feed far enough from zenith to insure elimination of HF leakage problem.
/ (348,10.5,11?)		I'm following your suggestion that we plan based on that the HF Transmitter bandwidth is broad enough that we can simultaneously transmit the two frequencies in the table below. If the frequency separation were to be too large at the widest HFf2 separations in the table below, then we would follow your backup suggestion of symmetrically one half the HF antennas on "the HF frequency” HFf1 and the other half (symmetrically) on "the HF frequency plus delta” HFf2, where " delta" is the frequency separation matched to tickle the lower hybrid resonance. Since the theory we seek to improve in this experiment is not likely good enough, we will have to step through a range of frequency separations to nail down the operative LH frequency here. This defines the HF part of experimental design. “Delta” will need to be computer controlled, as it will need to be stepped through a range of many frequencies, likely to excite the resonance. Measuring the ISR PL and ion component are essential, measuring SEE is highly desirable. More key detail on timing follows, under “timing” below. Since in an idealized smooth plasma the HF can’t come in perpendicular to B, we’re in part counting on scattering, but we know the plasma quickly structures, and we’re not turning off the HF long enough to return to “cold” conditions. SEE observations - Coordinate with Paul
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H3108FD: Frank Djuth/Herb CarlsonAltitude-resolved spectra of plasma turbulence in filamentary
structures excited with the new Arecibo HF facility		two sets see timetables below. 5.095MHz, O-mode
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15:29:30-15:39:30CW
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15:39:30-15:42OFF
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15:42-16:122min ON /2min OFF
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16:12-16:332.5 min ON /1min OFF
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16:33-17:182.5 min ON/ 5 min OFF
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17:18-18:332.5 min ON/ 10 min OFF
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T2567HC: Herb Carlson / Frank DjuthCreating space plasma from the groundHFf1 always = 5.095 MHz,
15:00-16:00 Set up

16:00-16:30: O-Mode, 3min ON/OFF
16:30 - 17:00 O-Mode, 3min ON / 3min OFF + 5s ON / 25s OFF

17:00-17:30: X-Mode, 3min ON/OFF

17:30 - 18:00 O-Mode, 3min ON / 3min OFF
18:00-18:30: O-Mode, 3min ON/OFF + 5s ON / 25s OFF

18:30 - 19:00 X-Mode, 3min ON / 3min OFF

19:00-19:30: O-Mode, 3min ON/OFF
19:30 - 20:00 O-Mode, 3min ON / 3min OFF + 5s ON / 25s OFF

20:00-20:30: X-Mode, 3min ON/OFF

20:30 - 21:00 O-Mode, 3min ON / 3min OFF
21:00-21:30: O-Mode, 3min ON/OFF + 5s ON / 25s OFF

21:30 - 22:00 X-Mode, 3min ON / 3min OFF

22:00-22:30: O-Mode, 3min ON/OFF
22:30 - 24:00 O-Mode, 6min ON / 6min OFF 		CLP. Dual beam. / (348,10.5,2?) Linefeed with no interference but low ZA. The receiver should record PL data 433-438 MHz, and 427-422 MHz

[i.e. 3-8 MHz up and down from 430 MHz.

Ask for the line feed and Gregorian system calibration temperatures prior to our run.

Get Phil to turn on the cal for ~30 s when the Gregorian is actually taking ionospheric data. Assuming this works, do the same with the line feed. (If not this is a good try.)

Do only once, at start of run.

Eliana asked Carlos Martinis for support with the BU imager, as discussed at CEDAR
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H3211AC: Anthea Coster/Eliana Nossa/Elizabeth Kendall/Astti BhattStudying mechanisms responsible for the formation and decay of the plasma line overshood as observed by the 430 MHz radarBegin experiment following a significant off time period (greater than 15 minutes): (See schedule with no previous experiment)
O-mode. Full power
4 min on/off, Cycle 5 periods.
8 min on/off, Cycle 5 periods.
2 min on/off, Cycle 5 periods.
Repeat cycles.		Greg. at vertical (1.1 degg off vertical), Line at 11 degreees, Azimuth at 348 degrees (magnetic north). Plasma and ion lines are requiredDuring Paul's time, we will just provide ISR data without changing Anthea’s experiment set up.
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H3206CF: Christopher FallenHF-enhanced UHF ion line and plasma line dependence on interaction altitude relative to the electron gyro-harmonic at Arecibo8 MHz or 5 MHz (FoF2>Fh). O-mode
Nominal cycle is 60s ON 60s OFF with 10ms pulses (1s IPP) in between ON cycles. (If problems with 10ms pulses, we should run 3min/2min ON/OFF) 		Dual beam (plasma and ion line). Gregorian: vertical, Linefeed: 11 degrees, Azimuth 348 (magnetic north)
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H3156PB: Paul BernhardtAltitude Resolved Stimulated Electromagnetic Emissions (ARSEE) Using Chirp HF TransmissionsDuring this time, the previous experiment should be running as instructed. No need to make modifications (VS, CF, AK or KJ).Plasma and ion line profiles. The configuration would be the same as the previous experiments.
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H3207KJ: Khushboo Jain* /Eliana Nossa/Shikha Raizada/Erhan KudekiStudy for E-F layer coupling under HF activity6 min/ 6 min ON/OFF + 3/1s ON/OFF (modulation only during the day if possible)Dual beam (plasma and ion line). Gregorian: vertical, Linefeed: 11 degrees: (348,1.2,11)Requires lidar and imagers (red/line) support
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H3199AK: Andreas Kvammen* / Juha VierinenStudy of Heating Induced Langmuir and Upper-Hybrid TurbulenceDay 1:
Full power
16:00-18:30: 8 MHz
19:00-20:00: 5 MHz
5 minutes with modulated heating and 5 minutes off
Modulations:
1. 0.5s/0.5s ON/OFF (No...)
2. 1s/1s ON/OFF (No..)
3. 2s/2s ON/OFF (If commercial power failure -> No, otherwise run carefully)
4. 4s/4s ON/OFF (If commercial power failure -> No, otherwise run carefully)
5. 8s/8s ON/OFF (If commercial power failure -> No, otherwise run carefully)
6. 5 minutes ON at 50 % full power

Day 2:
Full power
16:00-19:30: 8 MHz
5 minutes with modulated heating and 5 minutes off
Modulations:
1. 0.5s/10s ON/OFF
2. 1s/20s ON/OFF.
3. 2s/40s ON/OFF
4. 4s/80s ON/OFF
5. 8s/160s ON/OFF
CLP for ion and plasma line (electron temperature and the electron density). Dual beam. Gregorian: vertical, Line-feed: 11 deg off vertical, along the meridional south. Requires Tilt-photometer and Spectrophotometer and imagers (green and red lines). Accurate synchronization between the heater and the IS radar
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H3213: H3202, H3203, H3204, H3205, H3208, H3209, H3210EN: Eliana Nossa (JB/PH/AM/JM/QF/RW/HB: James Brittle, Poorya Hosseini, Ashanti Maxworth, Jackson McCormick, Quincy Flint, Robbie Wilkies, Hunter Burch)HF Summer School D region experimentsDetails defined by every student project. Requires lidar support to meassure densities/temperatures at D-region heights.
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Quincy Flint
UF_1A - Flint: ELF/VLF Wave Generation, Best Case
Best Case, 1 Minute. 5.1MHz, Square-wave amplitude modulation. Modulation frequency, X-mode:ISR Performs D-region Profiling Throughout
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 100%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 80%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 60%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 50%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 30%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 10%
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Repeat, switching to O-mode,5.1MHz, Full power, Square-Wave Amplitude modulation, frequency:
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 100%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 80%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 60%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 50%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 30%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 10%
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Repeat, switching to 8.175 MHz
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HF Frequency: 8.175 MHz
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HF Polarization: X-mode
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Modulation: Square-Wave Amplitude Modulation
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Modulation Frequency:
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 100%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 80%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 60%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 50%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 30%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 10%
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Repeat, switching to O-mode:
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HF Frequency: 8.175 MHz
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HF Polarization: O-mode
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Peak HF Power: 100%
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Modulation: Square-Wave Amplitude Modulation
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Modulation Frequency:
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 100%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 80%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 60%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 50%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 30%
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10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 10%
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Repeat whole 4-minute sequence.
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UF_1B - Flint: ELF/VLF Wave Generation, Worst Case
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ISR Performs D-region Profiling Throughout

Base Case, 1 Minute
HF Frequency: 5.1 MHz
HF Polarization: X-mode
Modulation: Square-Wave Amplitude Modulation
Modulation Frequency:
10 seconds: Linear Frequency-Time Ramp 0 Hz-10 kHz, Peak HF Power 100%
10 seconds: 1011 Hz, Peak HF Power 100%
10 seconds: 2023 Hz, Peak HF Power 100%
10 seconds: 3011 Hz, Peak HF Power 100%
10 seconds: 4023 Hz, Peak HF Power 100%
10 seconds: 5011 Hz, Peak HF Power 100%

Repeat whole 1-minute sequence.
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