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Table 7-9. TDRSS KuSA Return Service Customer Platform Signal Constraints (cont’d) Parameter (Notes 1, 2, and 14) Description (Notes 1, 2, and 14) Phase noise (rms) (Note 7 and 8) (cont’d) DG1 Mode 1 (Note 13) (cont’d) DG1 Mode 2 Channel baud rate > 16 ksps 1 Hz – 10 Hz 25.0 rms 10 Hz – 1 kHz 3.0 rms 1 kHz – 150 MHz 2.0 rms Channel baud rate < 16 ksps 1 Hz – 10 Hz 4.0 rms 10 Hz – 100 Hz 3.0 rms 100 Hz – 1 kHz 1.8 rms 1 kHz – 150 MHz 1.4 rms Channel baud rate > 16 ksps 1 Hz – 10 Hz 25.0 rms 10 Hz – 100 Hz 4.0 rms 100 Hz – 1 kHz 2.0 rms 1 kHz – 150 MHz 2.0 rms DG2 Coherent (Note 13) Channel baud rate < 434 ksps 1 Hz – 10 Hz 3.6 rms 10 Hz – 1 kHz 1.8 rms 1 kHz – 150 MHz 1.0 rms 434 ksps < Channel baud rate < 6 Msps 1 Hz – 10 Hz 50.0 rms 10 Hz – 1 kHz 6.0 rms 1 kHz – 150 MHz 2.4 rms Channel baud rate > 6 Msps 1 Hz – 10 Hz 50.0 rms 10 Hz – 1 kHz 5.5 rms 1 kHz – 150 MHz 1.1 rms Revision 10 7-42 450-<strong>SN</strong>UG
Table 7-9. TDRSS KuSA Return Service Customer Platform Signal Constraints (cont’d) Parameter (Notes 1, 2, and 14) Description (Notes 1, 2, and 14) Phase noise (rms) (Note 7 and 8) (cont’d) DG2 Noncoherent Channel baud rate < 108.5 ksps 1 Hz – 10 Hz 4.0 rms 10 Hz – 100 Hz 2.5 rms 100 Hz – 1 kHz 1.4 rms 1 kHz – 150 MHz 1.4 rms 108.5 ksps < Channel baud rate < 6 Msps 1 Hz – 10 Hz 50.0 rms 10 Hz – 100 Hz 5.5 rms 100 Hz – 1 kHz 2.4 rms 1 kHz – 150 MHz Channel baud rate > 6 Msps 2.4 rms 1 Hz – 10 Hz 50.0 rms 10 Hz – 100 Hz 10.0 rms 100 Hz – 1 kHz 2.0 rms 1 kHz – 150 MHz In-band spurious outputs, where in-band is twice the maximum channel baud rate 2.0 rms DG1 modes 1 and 2 > 23 dBc DG2 > 30 dBc Out-of-band emissions See Appendix D for allowable limits on out-of-band emissions, including spurs I/Q data skew (relative to requirements for I/Q data synchronization where appropriate) (peak) (Note 3)
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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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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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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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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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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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