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Download PDF for NASM-NASM.2014.0025-bx032-fd012_002 (project ID 25211)
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Steve Carnes, 8:19 AM 1/6/9.., KidSat Status Report, 6 Jan 95 2 We think that the KidSat downlink could work as follows: ESC via SCCI to Thinkpad with KCA, downlinked to high-end PC with KCA and ISDN card at JSC, over ISDN telephone fiber optic network to high-end PC (64MB RAM) with ISDN card at CalSpace, into Alpha, out over internet to schools. UPLINK: The KidSat uplink still has to be defined. KCA simplifies a lot of things. The Text And Graphic Services (TAGS) path is preferred over the command channel and recommended by JSC, but will be decided by the PIM and others in the Payload Integration Plan (PIP) based on how we define KidSat requirements (Form #1628). Sharon Castle said that the Flight Activities Officer and/or others would want to review all commands being sent up to the orbiter, which would effectively eliminate real-time KidSat control. One way around this might be to follow a German robotics experiment on STS-55 which, after a safety review and test demonstration, convinced NASA that none of the commands could adversely affect the orbiter, thus it was allowed to operate autonomously from the ground. MCC WORKSTATIONS: Spent time on the new MCC workstations. Lots of graphics, some applicable to KidSat. Has ability to customize for KidSAt, but will take more programming effort. ELECTRONIC STILL CAMERA: Met with Phyllis Grounds again about the ESC. They are not willing to "buy in" to our idea of autonomous camera operation. Their mindset is that is is too far beyond what they are doing for them to support it. But they do offer support in terms of what they have already accomplished. The ESC group have made camera image files (raw data and TIFF) available to us via ftp (escserver.nasa.gov). They also have written utilities to append telemetry data as a bitmapped font to images. Phyllis gave us copies of previous (older model) ESC malfunction procedures and related paperwork. If the ESC doesn't work, there is very little that the crew can do except power down, restart and if that doesn't work, stow it away. Kodak did not come through with paperwork so we will not get to look at the new camera before we leave. At present, photoshop "plug-in" software modules for interpolation (changing virtual pixels into a bitmap) are only available for Macintosh, not DOS. Currently vaporware at Kodak. INFORMATION SHARING PROTOCOL (ISP): Met with Steve Weismuller, one of the Information Sharing Protocol (ISP) programmers. Got a copy of the latest user's guide and reference manual. The ISP software and more documentation is available from a NASA center (COSMIC) at the University of Georgia. About $500. ISP development and maintenance has been turned over to Pat Schaeffer at LORAL. INTEGRATED SERVICES DIGITAL NETWORK (ISDN): There are three types of ISDN service: Basic Rate ISDN (BRI), Primary Rate ISDN (PRI), and Broadband ISDN (B-ISDN). BRI: consists of two 64 kbps B channels and one 16 kbps D channel for a total of 144 kbps. The basic service is intended to meet the needs of most individual users. PRI: intended for users with greater capacity requirements. Typically the channel structure is 23 B channels plus one 64 kbps D channel for a total of 1.544 Mbps. B-ISDN: still in development and will support as much as 150 Mbps, but will be dependent of a complete optical fiber network. Bellcore has set up a national ISDN information clearing house hotline at 800-992-4736 for information about ISDN availability. Printed for sride@ucsd.edu (Sally K. Ride) 2
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