SN User's Guide - ESC Home - NASA

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LEO-T Low Earth Orbiting-Terminal LHC Left-hand circular LHCP Left-Hand Circular Polarization LI local interface link Includes either all data and/or range channels provided by a TDRS forward or return service to a customer platform. In the case of SA service, a link is defined relative to a specific antenna on a particular TDRS. In the case of MA service, a link is defined relative to a particular TDRS. LOS Line-of-sight LR low rate LRDS Low Rate Data Switch LRS Low Rate Switch MA Multiple Access MAF Multiple Access Forward MAR Multiple Access Return Mbps megabits per second MCC Mission Control Center MDM multiplexer/demultiplexer MGS McMurdo Ground Station MHz megahertz MI mutual interference MOC Mission Operations Center MOCC Mission Operations Control Center MORR Mission Operations Readiness Reviews MSB most significant bit msec millisecond Msps megasymbols per second MTRS(2)(U) McMurdo TDRSS Relay System(2)(Upgrade) N North NA not applicable NAM Network Advisory Message NASA National Aeronautics and Space Administration Revision 10 GL-7 450-SNUG
NASCOM NASA Communications Network NCC Network Control Center NCCDS NCC Data System NEC NASCOM Event Cancel NEN Near Earth Network NES NASCOM Event Schedule NEST NISN/NASA Event Scheduling Terminal NGIN Next Generation Integrated Network NIC Network Integration Center NIM Networks Integration Manager NIMO Networks Integration Management Office NISDDT NASCOM Interface Standard for Digital Data Transmission NISN NASA Integrated Services Network NOM Network Operations Manager NOSP Network Operations Support Plan NPAS Network Planning and Analysis System NPG NCC Protocol Gateway NRD Network Requirements Document NRR NASCOM Reconfiguration Request; Network Requirements Review NRZ nonreturn to zero NRZ-L nonreturn to zero level NRZ-M nonreturn to zero mark NRZ-S nonreturn to zero space nsec nanosecond NSF National Science Foundation NTIA National Telecommunications and Information Agency O&M Operations and Maintenance OBO Output Back-Off OCXO Oven Controlled Oscillator ODM Operations Data Message (from GTs to NCCDS) Revision 10 GL-8 450-SNUG
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452 / Space Network Project 450-SNU
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Space Network Users’ Guide (SNUG)
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Preface The Space Network Users’
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Change Information Page List of Eff
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Table of Contents Section 1. Introd
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6.2.5 Real-Time Configuration Chang
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Appendix B. Functional Configuratio
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Appendix J. Customer Constraints fo
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Figure 10-5. NCCDS/NEST Scheduling
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Figure B-6. Customer Platform Funct
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NASA Standard Transponder .........
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Table B-3. Data Configuration Const
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1.1 Purpose and Scope Section 1. In
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Section/ Appendix Table 1-1. Docume
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S SN Future Services Describes futu
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Many of the links require access to
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Revision 10 1-9 450-SNUG https://co
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Section 2. SN Overview 2.1 General
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Revision 10 2-3 450-SNUG Customer P
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Multiple Access Antenna • 30 elem
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Table 2-1. Example of TDRS Constell
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services. The detailed TDRS spacecr
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Average Coverage (%) 100 95 90 85 8
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quality. For further information on
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3.1 General Section 3. Services Ava
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Revision 10 3-3 450-SNUG MA (note 1
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Table 3-2 provides an overview of t
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Revision 10 3-7 450-SNUG TDRS G/T (
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Data Group and Mode (note 4) Table
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platforms to have SA support on one
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a TDRS. Compatibility testing is pe
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NASA-unique 4800 bit block and then
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Revision 10 3-17 450-SNUG Table 3-4
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the Space Network's ability to supp
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4.1 Overview Section 4. Obtaining S
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5.1 General Section 5. MA Telecommu
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an appropriate forward service has
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Table 5-1. TDRSS MA Forward PSK Ser
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NOTE: Customers who operate in a SS
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Table 5-3. Salient Characteristics
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e. The customer platform receiving
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DG1 (note 1) Table 5-6. TDRSS MA Re
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Table 5-6. TDRSS MA Return Service
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platform transmit frequency for non
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configurations, the I-Q channel amb
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Acquisition (note 3) (cont’d): Ta
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d. After symbol/decoder and symbol/
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Section 3, paragraph 3.5 for guidel
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5.3.3.4 Reacquisition While in the
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5.3.5 Acquisition Scenarios The fol
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d. DG2 Mode Transitions. 1. DG2 non
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6.1 General Section 6. SSA Telecomm
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6.2.2 PSK Signal Parameters The TDR
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Table 6-1. TDRSS SSA Forward PSK Se
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6.2.2.2 BPSK Signal Parameters a. B
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unless the customer is utilizing th
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Table 6-2. TDRSS SSA Forward Phase
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Table 6-3. TDRSS SSA Forward Servic
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d. The customer platform receiving
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DG1 (note 1) Table 6-7. TDRSS SSA R
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Table 6-7. TDRSS SSA Return Service
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6.3.2.2 DG1 Signal Parameters DG1 s
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and signal characteristics specifie
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3. Balanced Power Single Data Sourc
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and an ephemeris uncertainty as def
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Table 6-11. SSA Return Service Real
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2. DG1 Mode 1 (or 3) to DG1 Mode 2
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Table 6-12. TDRSS SSA Return Servic
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service is supported through TDRS F
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Table 6-14. TDRS SSAR IF Service Sp
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7.1 General Section 7. KuSA Telecom
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c. Frequency Sweep on the Forward L
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Table 7-1. TDRSS KuSA Forward Servi
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7.2.5 Acquisition Scenarios The fol
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Table 7-4. KuSA Forward Service Rea
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Table 7-5. TDRSS KuSA Return Servic
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. SQPSK Modulation. SQPSK modulatio
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7.3.2.3 DG2 Signal Parameters DG2 s
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Revision 10 7-21 450-SNUG Dual Data
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code and carrier acquisition will b
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identical data) having unbalanced I
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acquisition, the process should tra
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Table 7-8. KuSA Return Service Real
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egins) or by its customer platform
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Reconfiguration and reacquisition b
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7.3.6 225 MHz IF Service This secti
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Table 7-11. TDRS KuSAR IF Service S
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7.3.6.3 Potential Signal Performanc
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8.1 General Section 8. KaSA Telecom
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8.2 KaSA Forward Services 8.2.1 Gen
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Table 8-1. TDRSS KaSA Forward Servi
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c. Asynchronous Data Modulation. Fo
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Table 8-2. TDRSS KaSA Forward Servi
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in Table 8-1. The EIRP directed tow
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Table 8-5. TDRSS KaSA Return 225 MH
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Single Data Source Dual Data Source
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Revision 10 8-21 450-SNUG Acquisiti
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8.3.3.2 Bit Error Rate (BER) Table
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d. Loss of Autotrack. Loss of autot
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Table 8-8. KaSA Return Service Real
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noncoherent transmissions are desir
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Table 8-9. TDRSS KaSA Return 225 MH
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Changes to the operating conditions
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Table 8-11. TDRS KaSAR 225 MHz and
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Section 9. Tracking and Clock Calib
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(sample-to-sample) range data as in
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NOTE: The definition of 240. MHz is
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time" refers to that portion (leadi
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e. TDRSS Delay Compensation. The WS
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Section 10. SN Operations for TDRSS
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Table 10-2. Overview of SN Message
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10.2.2.6 Schedule Distribution List
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Table 10-3. Schedule Request Descri
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Revision 10 10-9 450-SNUG Applicabl
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10.2.3.4 Forecast Scheduling Genera
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which have been committed to the SN
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10.2.4.2 Specific Schedule Request
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e. Each SSC represents a single ser
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NOTE: TUT reports are not transmitt
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Scheduling Data (SHO) Operations Me
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10.2.7.2 NISN Event Schedule (NES)
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System Element Table 10-7. Real-tim
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System Element Table 10-9. Real-tim
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System Element Table 10-10. Real-ti
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System Element Table 10-10. Real-ti
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Revision 10 10-33 450-SNUG Message
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10.4 Customer Platform Emergency Op
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operations. During a customer platf
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Appendix A. Example Link Calculatio
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A.3.2 Forward service link calculat
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User Spacecraft G/T (dB/K) 20 10 0
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. Required Eb /No is 9.9 dB (BER of
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Ideal Required Prec (dBWi) -150 -16
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Appendix B. Functional Configuratio
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Customer MOC SN Data Interface WDIS
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Revision 10 B-5 450-SNUG SN Ground
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Revision 10 B-7 450-SNUG SN Ground
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The SN return services are divided
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Revision 10 B-11 450-SNUG From chan
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Revision 10 B-13 450-SNUG From sing
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Revision 10 B-15 450-SNUG NRZ Only
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Revision 10 B-17 450-SNUG Table B-3
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The signal is transmitted using unb
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Appendix C. Operational Aspects of
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service PN codes (command and range
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Revision 10 C-5 450-SNUG Table C-1.
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Revision 10 C-11 450-SNUG Table C-3
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Revision 10 C-13 450-SNUG Table C-3
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C.4 Reacquisition C.4.1 Introductio
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Table C-4. Parameters Which Impact
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Customer MOC/NCCDS changes operatin
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. Initial acquisition not achieved
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Appendix D. Spectrum Considerations
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For most Space Network users, the a
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PFD (α) = maximum power flux densi
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Equation D-5: sin 4 ( x) P T , / 2
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For signals with two channels, the
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PFD (dBW/m^2/4kHz) -142 -144 -146 -
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Figure D-4. NTIA Out-of-Band (OOB)
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Table D-5. Spectrum Points of Filte
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criteria for deep space operations
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PSD (dBW/Hz) -170 -180 -190 -200 -2
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potential interference to other sys
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Annex to Appendix D D.A.1 Special C
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Table D.A-1. Peak Power Calculation
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Appendix E. Customer Platform and T
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1. Jitter = None (Coded or Uncoded
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Figure E-8. QPSK Phase Imbalance id
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R max R ideal Figure E-11. Residual
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For forward service: O/ OUT AM / PM
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E.16 Out-of-Band Emissions Out-of-b
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E.21 PN Chip Rate PN code chip rate
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Appendix F. Periodic Convolutional
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Revision 10 F-3 450-SNUG ENCODER SY
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Appendix G. Predicted Performance D
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G.3.3 If the RFI environment become
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G.6 SSA and MA Forward Service RFI
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Appendix H. Demand Access System (D
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H.1.4 DAS Service Modes There are t
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DAS provides service through each s
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modulation format. Acquisition by D
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H.1.5.3 Transmission Delays The ove
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Receiving service request responses
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Revision 10 H-13 450-SNUG Customer
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H.3.2 Communications Interface H.3.
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Upon determining that the request i
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Appendix I. NASA Integrated Service
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Figure I-1. NISN/SN Legacy Interfac
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I.2.2 Non-IP Routed Data Services P
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Network Control Header Customer Hea
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NOTE: A block with bit 82 set to bi
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Appendix J. Customer Constraints fo
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J.3 Acquisition For S-band DG2 nonc
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Appendix K. Use of Reed-Solomon Cod
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NOTE: Throughout this document, the
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Appendix L. McMurdo TDRSS Relay Sys
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Appendix M. Deleted This page inten
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N.3 Test Services Description Test
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TDRSS component may require the who
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N.6.2 Test Scheduling The use of al
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model also determined duty cycles f
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P.1 Major System Components P.1.1 C
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P.2 External Interfaces P.2.1 Netwo
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Page 533 and 534: In general, to obtain SN services,
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Page 537 and 538: Figure R-1. SN Gateway Overview Rev
Page 539 and 540: Figure R-3. WSC SN Gateway Interfac
Page 541 and 542: Table R-1. Comparison of Between WD
Page 543 and 544: Table S-1. TDRSS Forward Service Si
Page 545 and 546: Service Modulation Coding (2) Data
Page 547 and 548: Service Data Group DG2 (5) Phase Mo
Page 549 and 550: Service Data Group Mode Modulation
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Page 553 and 554: Command Data Telemetry Data Ground
Page 555 and 556: And Data Handling (C&DH), referred
Page 559 and 560: Table U-1. TDRSS MAR Service Recomm
Page 561 and 562: Table U-2. TDRSS SSAR Service Recom
Page 565 and 566: BSR bit slippage rate BW bandwidth
Page 567 and 568: EET End-to-End Test EIF Engineering
Page 569: IRAC Interdepartmental Radio Adviso
Page 573 and 574: R R range acceleration between a T
Page 575 and 576: SND Space Network Directive SNG SN
Page 577: T s receiving system noise temperat
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