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and Single Access Return (SSAR), Ku-band Single Access Return (KuSAR), and Kaband Single Access Return (KaSAR) through TDRS F8 – F10 (and K, L, M once launched). Return services are divided into two major groups, Data Group 1 (DG1) and Data Group 2 (DG2). DG1 services utilize spread spectrum modulation while DG2 services are non-spread. Revision 10 3-2 450-<strong>SN</strong>UG
Revision 10 3-3 450-<strong>SN</strong>UG MA (note 10) Table 3-1. TDRSS Forward Service Characteristics SSA (note 10) KuSA (note 10 and note 11) KaSA (TDRS F8-F10 and TDRS K, L, M) (note 10) Customer service links/satellite (note 2) 1 2 2 2/TDRS up to 8/WSC Space-to-Space Freq. Bands 2106.4 MHz 2025.8-2117.9 MHz (note 6) 13.775 GHz 22.55-23.55 GHz (note 6) Space-Space LHCP only LHCP and RHCP (selectable) (note 9) LHCP and RHCP (selectable) (note 9) LHCP and RHCP (selectable) (note Polarization 9) RF Channel BW (3 dB, minimum) 6 MHz 20 MHz 50 MHz 50 MHz Max Data Rate 300 kbps 7 Mbps (note 12) 25 Mbps (note 5) 7 Mbps (note 14) Modulation(notes 1 SS-UQPSK/SS- SS-UQPSK/SS-BPSK for data rates < SS-UQPSK/SS-BPSK for data rates SS-UQPSK/SS-BPSK for data rates and 4) BPSK; data rates 300 kbps
Page 1 and 2: 452 / Space Network Project 450-SNU
Page 3 and 4: Space Network Users’ Guide (SNUG)
Page 5 and 6: Preface The Space Network Users’
Page 7 and 8: Change Information Page List of Eff
Page 9 and 10: Table of Contents Section 1. Introd
Page 11 and 12: 6.2.5 Real-Time Configuration Chang
Page 13 and 14: Appendix B. Functional Configuratio
Page 15 and 16: Appendix J. Customer Constraints fo
Page 17 and 18: Figure 10-5. NCCDS/NEST Scheduling
Page 19 and 20: Figure B-6. Customer Platform Funct
Page 21 and 22: NASA Standard Transponder .........
Page 23 and 24: Table B-3. Data Configuration Const
Page 25 and 26: 1.1 Purpose and Scope Section 1. In
Page 27 and 28: Section/ Appendix Table 1-1. Docume
Page 29 and 30: S SN Future Services Describes futu
Page 31 and 32: Many of the links require access to
Page 33 and 34: Revision 10 1-9 450-SNUG https://co
Page 35 and 36: Section 2. SN Overview 2.1 General
Page 37 and 38: Revision 10 2-3 450-SNUG Customer P
Page 39 and 40: Multiple Access Antenna • 30 elem
Page 41 and 42: Table 2-1. Example of TDRS Constell
Page 43 and 44: services. The detailed TDRS spacecr
Page 45 and 46: Average Coverage (%) 100 95 90 85 8
Page 47 and 48: quality. For further information on
Page 49: 3.1 General Section 3. Services Ava
Page 53 and 54: Table 3-2 provides an overview of t
Page 55 and 56: Revision 10 3-7 450-SNUG TDRS G/T (
Page 57 and 58: Data Group and Mode (note 4) Table
Page 59 and 60: platforms to have SA support on one
Page 61 and 62: a TDRS. Compatibility testing is pe
Page 63 and 64: NASA-unique 4800 bit block and then
Page 65 and 66: Revision 10 3-17 450-SNUG Table 3-4
Page 69 and 70: the Space Network's ability to supp
Page 71 and 72: 4.1 Overview Section 4. Obtaining S
Page 73 and 74: 5.1 General Section 5. MA Telecommu
Page 75 and 76: an appropriate forward service has
Page 77 and 78: Table 5-1. TDRSS MA Forward PSK Ser
Page 79 and 80: NOTE: Customers who operate in a SS
Page 81 and 82: Table 5-3. Salient Characteristics
Page 83 and 84: e. The customer platform receiving
Page 85 and 86: DG1 (note 1) Table 5-6. TDRSS MA Re
Page 87 and 88: Table 5-6. TDRSS MA Return Service
Page 91 and 92: platform transmit frequency for non
Page 93 and 94: configurations, the I-Q channel amb
Page 95 and 96: Table 5-8. TDRSS MA Return Service
Page 97 and 98: Acquisition (note 3) (cont’d): Ta
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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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Table 5-11. TDRSS MA Return Service
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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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Table 6-4. Salient Characteristics
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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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Revision 10 6-25 450-SNUG Table 6-8
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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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Table 8-3. Salient Characteristics
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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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Table B-5. Data Configuration Const
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Table B-7. Data Configuration Const
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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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This page intentionally left blank.
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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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The user will be able to print eith
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SNAS MOC user will be able to speci
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The SNAS will allow a minimum durat
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the DAS Resource Allocation Request
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gateway and a proxy for the Closed
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Figure Q-1. WDISC Overview Q.2.1 IP
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database management, testing, troub
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In general, to obtain SN services,
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scheduling of SN Gateway services a
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Figure R-1. SN Gateway Overview Rev
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Figure R-3. WSC SN Gateway Interfac
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Table R-1. Comparison of Between WD
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Table S-1. TDRSS Forward Service Si
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Service Modulation Coding (2) Data
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Service Data Group DG2 (5) Phase Mo
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Service Data Group Mode Modulation
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Command Data Telemetry Data Ground
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And Data Handling (C&DH), referred
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Table U-1. TDRSS MAR Service Recomm
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Table U-2. TDRSS SSAR Service Recom
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BSR bit slippage rate BW bandwidth
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EET End-to-End Test EIF Engineering
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IRAC Interdepartmental Radio Adviso
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NASCOM NASA Communications Network
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R R range acceleration between a T
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SND Space Network Directive SNG SN
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T s receiving system noise temperat
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