I heard there are some bolds that are not fitting properly. What's going on there? What are the results if they cannot fix that ontime? What are the current effects? Except the loss of all 4 video downlink channels. I heard there were a temp loss of voice comm in the russian segment, but that is online again. I also heard the crew sends down MPC video downlink of the current activities of the HRCS ops.
ISS and the ground centers are conducting comm checks on the new space to ground 3 and 4 channels thanks to the Ku band upgrade. The quality and clarity were mixed and less than existing channels as expected per the planning document on L2. Tests were not conducted with Moscow--I don't know if they are planned to have access.
The HRCS Ku Comm Unit upgrades will:· increase Ku-band downlink bandwidth from 150 Mbps to 300 Mbps;· increase Ku-band uplink bandwidth from 3 Mbps to 25 Mbps; · add Space to Ground (S/G) 3 and S/G 4 voice channels;· increase downlink standard definition video channels from 4 to 6; · replace the Video Tape Recorders (VTRs) with solid state video recording for standard definition; · replace Orbital Communications Adapter (OCA); · add the ability to command US core systems through Ku-band if S-band fails.
Quote from: Targeteer on 04/03/2013 03:11 pmISS and the ground centers are conducting comm checks on the new space to ground 3 and 4 channels thanks to the Ku band upgrade. The quality and clarity were mixed and less than existing channels as expected per the planning document on L2. Tests were not conducted with Moscow--I don't know if they are planned to have access.When it was mentioned a couple of years back, I remember understanding that USOS only tests would occur first with just MCC-Houston and POC-Huntsville and then with USOS partner MCC's and POC's before tests between USOS and RS would be carried out one channel at a time. I also remember some mention that RS Avionics hardware and software would require changeout/upgrade of a few or so boxes, two of which are located next to each other in FGB Zarya Module. Eventual future R&R of two cables (data cables between FGB computers and Unity and Z1 I am assuming that these are external but I am not completely sure) with upgraded higher capacity cables providing additional backup capability if RS loses an antenna in the future. RS Avionics software upgrades will pave way for full operational use of Luch data relay satellite system across entire ISS as required and provides a backup antenna to USOS Ku antennas if a problem arises that prevents use of both antennas until a spacewalk.An added benefit to the ISS Avionics upgrades on the software side is added support for navigation and position location via EU's Galileo global navigation satellite system once it become operational.
Finally got an example of video via the new Ku system - anyone notice an increase in quality? I think I see a slight increase.
Quote from: Space Pete on 04/06/2013 08:35 pmFinally got an example of video via the new Ku system - anyone notice an increase in quality? I think I see a slight increase.There is an increase! You have to look when they have the LAB cam online on Downlink 1 no more pixels at all! That's great!