Mars Reconnaissance Orbiter

Status
Please reply by conversation.
Fizbi

Fizbi

Thread Starter
SatelliteGuys Pro
May 16, 2008
539
78
Wild and Windy Casper, WY
I need transponder/pid info to lock onto the HiRISE on NASA's Mars Reconnaissance Orbiter with my FTA dish.

Can anyone help?

:D
 
Anole

Anole

SatelliteGuys Master
Sep 22, 2005
11,819
13
L.A., Calif.
I think we'll need to put your dish on steroids before it's likely to hear that.
Or maybe, Viagra! - :eek:

Also, don't they super-cool their front ends?
I know I get upset when I pour a Coke in my lap, so that doesn't sound like fun. -:D
 
Steveo

Steveo

SatelliteGuys Family
Apr 9, 2007
108
0
Cairns, Australia
That's a big ask Fizbi. Even out of my league:D
Did catch it on NASA Tv though, they did all the hard work for me:)
 
Anole

Anole

SatelliteGuys Master
Sep 22, 2005
11,819
13
L.A., Calif.
None of the info on that web site seems to be current (so far as I noticed)
So it's possible that through improvements they moved from a 1.8m to a 1.0m dish, or NOT.
Perhaps the larger dish is partly responsible for the improved signal.

Update 7-January-2006
Received MRO again this evening, signals were about 4 to 5dB above the noise, and copyable in SSB. The MRO was 69593573 miles away which is 25 million miles further away than when I first copied a signal from it! The photos below show some close-ups of the LHC feed horn with depolarising screws, and the feed horn mounted on the feed arm of the 1m dish.

Still, I found this to be the most amusing:
The MRO has a 3 meter diameter dish antenna driven by a 100 Watt TWTA to transmit signals to Earth - this means that the signal coming in our direction is of the order of 4.2 mega watts of RF.
 
GrumpyGuy

GrumpyGuy

SatelliteGuys Pro
Jun 17, 2006
249
0
Northeast Ohio
The 4.2 mega watts of ERP caught my attention too, Anole. That is one heck of a spot beam! Guess this would explain why NASA refers to it as the High Gain.

Since the UK hams were getting 6-8dB of usable signal with a 1 meter dish, seems to me that with a bit of tweaking, we should be able to get better than 0dB with a pizza pan ... right? :eureka

Found some interesting stuff regarding the MRO's communications systems in Lunar and Planetary Science XXXVIII (warning, .pfd format)

Smith, you are linking to and quoting from a different page than the one I cited in my original post ... but you already know that, don't ya? :)
 
Status
Please reply by conversation.

Users Who Are Viewing This Thread (Total: 0, Members: 0, Guests: 0)

Latest posts

Top