Falcon Heavy “50/50 chance” launch today (1730 UT), without DSX. DSX (WPIx) is now on the third Heavy flight, which might be in June if the preferred “50” prevails today. If not, maybe Stefan, Markus, Joe, Riccardo or Tom will come up with something.
Jim AA5BW
Correction: 12000km/6000km elliptical retrograde orbit
Also agree 500W could be pulse ERP
Unofficial r/SpaceX page https://www.reddit.com/r/spacex/wiki/launches/manifest now shows December 2017; last update to the manifest was May 8; looks dependent on F9 Heavy demo launch scheduled for summer.
Many delays since 2008 (for DSX) due to low priority and special (9000km/6000km elliptical retrograde) orbit.
Some web references show operational life as 6 months with goal of 12 months (radiation as one possible limit).
From link below (in prior messages):
Cross-dipole antenna is 80m tip-to-tip (Y) and 16m tip-to-tip (Z): X,Y for receive; Y for transmit
Two TX modes: whistler (3-50 kHz, 500-900W) and boomerang (50-750 kHz, 1 W)]; real-time tuning/matching
Dipole receiver sensitivity: 0.01uV/rt-Hz RX
Separate 3-axis-loop receiver sensitivity: 3fT/rt-Hz
Guessing 500W is specified at the battery.
Jim AA5BW
On Thursday 18 May 2017 19:45:51 you wrote:
> FYI:
>
> The "DSX" satellite will carry a 0.5-0.9 kw, 3 to 50 kHz (pulsed?) VLF
> transmitter.
>
> Citation from: www.dtic.mil/dtic/tr/fulltext/u2/a531813.pdf :
>
> "...and a two week high-power VLF transmission campaign will occur near the
> end of the mission." End of life is planned at 12 months after launch and
> "Early Operations".
>
> As far as I understand the tx-antenna will be a 2x40m dipole.
>
> Launch is scheduled for 2017-xx-xx (Falcon Heavy launch vehicle).
>
> 73 de df3lp,
> Peter
Interesting mission.
https://directory.eoportal.org/web/eoportal/satellite-missions/d/dsx
Here some details about the spacecraft transmission.
http://smartech.gatech.edu/bitstream/1853/8037/2/SSEC_SD1_doc.pdf
TNX
Claudio ik2pii
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