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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