SOURCES SOUGHT
A -- KA-BAND STATION FOR THE SOLAR DYNAMICS OBSERVATORY (SDO) PROJECT
- Notice Date
- 8/19/2002
- Notice Type
- Sources Sought
- Contracting Office
- NASA/Goddard Space Flight Center, Code 214.4, Greenbelt, MD 20771
- ZIP Code
- 20771
- Solicitation Number
- SD0-0001-508
- Response Due
- 9/19/2002
- Point of Contact
- Carlos R McKenzie, Contracting Officer, Phone (301) 286-0599, Fax (301) 286-0214, Email Carlos.R.McKenzie.1@gsfc.nasa.gov
- E-Mail Address
-
Email your questions to Carlos R McKenzie
(Carlos.R.McKenzie.1@gsfc.nasa.gov)
- Description
- NASA/GSFC is hereby soliciting information for potential sources and industry comments concerning equipment availability, operability and construction of a Ka-Band Station for the Solar Dynamics Observatory (SDO) Project SDO is the first mission under the Living with a Star (LWS) Program as part of the Sun Earth Connection. SDO will be made up of several instruments seeking to characterize the dynamic state of the Sun, thus enhancing our understanding of the solar process and space weather. SDO is viewed as a follow on to the highly successful Solar and Heliospheric Observatory (SOHO) mission. SDO will be a three-axis stabilized satellite in a circular geosynchronous orbit of ~105? longitude and having an inclination of 28.5?. SDO will also have a mission life of 5 years. SDO will provide a continuous downlink of high rate data (150-200 Mbps) stream. The transmitted data will be SQPSK modulated at Ka-band carrier (25.5-27 GHz), and the EIRP from the spacecraft will be 44-50 dBW The science and housekeeping data will be electronically distributed to the Science Operation Centers in real-time. There will be a temporary data storage capability at each ground station for the purpose of buffering data in cases of equipment failure or other unforeseen problem on the ground. The SDO Project may procure for Ka-band ground stations that would meet the SDO requirements. However, there are some fundamental questions that need to be addressed. The questions are as follows: 1) What types of Ka-Band/RF manufacturers do you have experience with? 2) What spacecraft missions have you supported at the Ka-band frequencies? 3) What dish size would you recommend for SDO based on the information provided? Assume the ground antenna must point to within its .25dB beam width. (see attachment A: downlink calculations for SDO) 4) Will the Ka-band system handle various spacecraft transmitter designs? Modulation format is expected to be Staggered Quadrature Phase Shift Keying (SQPSK). What data formats are supported? Are multiple simultaneous transmissions possible? 5) Will a radome be required to assure pointing accuracy from White Sands location? 6) State the pros and cons of a radome for Ka-band applications? 7) What solar radio frequency interference issues may inhibit the effectiveness of your design? 8) What additional loss can be expected due to a radome? 9) What G/T can be expected, including losses to the LNA? 10) What losses will be incurred when an S-band system is installed with the Ka-band system? 11) Is diversity combining recommended for circularly polarized signal from a geosynchronous orbit? 12) What's the maximum, reliable data rate, that can be Viterbi decoded with today's technology? 13) Will the SDO project be able to decode serially at our I/Q rates of up to 100/100Mbps rate .5 encoded? 14) What is the recommended service interval recommended for a Ka-band system? 15) What additional cost would be incurred if automation were included in Ka-band system? 16) What costs would be incurred if 128Kbps, S-band, transmitter/receiver were co-located on antenna? Sources with information relevant to this notice are asked to respond by submitting a white paper of no more than ten (10) pages which conforms to attachment 1 entiltled , "Template For SDO Ka-band ground station". The paper should clearly address a prospective of how to meet current SDO requirement of high, continuous data (150+Mbps) downlink rates. Vendors should provide a rough order of magnitude of costs for such a system. Comments and questions regarding this notice are encouraged and solicited. Responses should demonstrate the technical feasibility, operational robustness and reliability, and simplicity and straightforwardness for operators. Vendors that have provided expertise in Ka-band ground stations with associated equipment are encourage to respond. Technical questions should be directed to: Mr. Raymond Pages, SDO Ground System Manager, Code 581, Goddard Space Flight Center, Tel. (301) 286-6012, Fax (301) 286-0334, E-mail: Raymond.J.Pages.1@gsfc.nasa.gov. Procurement related questions should be directed to the point of contact listed below. No solicitation exists; therefore, do not request a copy of the solicitation. If a solicitation is released it will be synopsized in FedBizOpps and on the NASA Acquisition Internet Service. It is the potential offerors responsibility to monitor these cites for the release of any solicitation or synopsis. All information received from this RFI will be combined and used for government procurement and planning purposes. Sources are urged to describe their approach in enough detail so that NASA can plan for subsequent opportunities for which proprietary information is appropriate. The information received in response to this notice will be reviewed and summarized by a panel of government and industry experts. Some or part of the summarized and synthesized recommendations may or may not form the basis of a future NASA requirements. This synopsis is for information and planning purposes and is not to be construed as a commitment by the Government nor will the Government pay for information solicited. Respondents will not be notified of the results of the evaluation. Respondents deemed fully qualified will be considered in any resultant solicitation for the requirement. Please advise if the requirement is considered to be a commercial or commercial-type product. A commercial item is defined in Internet "Note A". [INTERNET ONLY (commercial product definition)] The Government reserves the right to consider a small business or 8(a) set-aside based on responses hereto. All responses shall be submitted via electronic mail, regular mail, or fax to Mr. Raymond Pages as inidacted above no lather than September 16, 2002. If you respond via regular mail or fax, please provide an electronic copy in Microsoft Word format in addition to the printed version of your submission In responding reference "KA-BAND STATION FOR THE SOLAR DYNAMICS OBSERVATORY (SDO) PROJECT No. SDO-0001-508. Any referenced notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nasanote.html --------------------------------------------------------------------------- --------------------------------------------------------------------------- ------------------------------------------------ ATTACHMENT 1 "TEMPLATE FOR THE SDO KA-BAND STATION SUBMITTAL" 1. Background and Description of Proposed Approach Describe in adequate detail the specific approach to implementing the Ka-band station, which is being proposed for SDO Project consideration, the current state of its development, types of interfaces, the comparability of your approach with or its use of current and/or anticipated commercial approaches. You will want to provide an Operations Concept ("a day in the life" scenario) illustrating the use of your approach. 2. Operational Robustness and Flexibility for Growth and Evolution of Proposed Approach Address the operational reliability and robustness of your proposed approach, as well as simplicity and straightforwardness for data capture. 3. Provide a rough block diagram of ground station implementation at the component level. 4. Cost to Operate Provide a rough estimate of the cost to operate the Ka-band station on an annual basis. Attachment A SDO KA BAND DOWNLINK CALCULATION SPACECRAFT RETURN LINK Data Rate (kbps) 150000.0 Carrier Frequency (MHz) 26500.0 Xmitter Power (Watts) 5.0 Xmitter Power (dBm) 37.0 Passive Loss (dB) -3.0 Xmit Ant Gain (dB) 40.0 0.5 m. dish EIRP (dBm) 74.0 TRANSMISSION MEDIUM Range (km) 38691.3 Propagation Loss (dB) -212.7 Atmospheric Atten (dB) -2.5 Rain Atten (dB) -5.0 User Pointing Loss (dB) -0.5 User Polarization Loss (dB) -0.50 Total Space Path Loss (dB) -221.2 USER-GND SYST CHARACTERISTICS Gnd Ant Diameter (ft) 30.50 9.33 meter dish Antenna Efficiency 0.60 Gnd Ant Gain (dB) 66.0 Received Pwr (dBm) -81.2 System Noise Temp (K) 360.0 3 dB NF=288.6 System G/T (dB/K) 40.5 Implementation Loss (dB) -3.0 Receiver loss, I/Q pwr. split, data imperfections, etc. Received SNR - Eb/No (dB) 7.1 Req'd Eb/No for 1E-5 BER (dB) 3.6 Rate 1/2, K=7 Conv., R/S coding Signal Margin (dB) 3.5 SPACECRAFT ORBIT PARAMETERS Perigee (km) 35865.0 Apogee (km) 35865.0 Elevation Angle (deg) 30.0 Minimum Range (km) 35865.0 Maximum Range (km) 38691.3 Mean Earth Radius 6378.0 Re + Perigee 42243.0 NOTE: These are general specifications and may not be the actual RF parameters for spacecraft design.
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- Record
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