                     THIS IS NOT AN OFFICIAL DOCUMENT!          NSTS 17462-50
                       This is a scanned copy of the               Revision H
                          original document, and
             it MUST not be used as a source for flight data 
                           or change requests.



     FLIGHT REQUIREMENTS
     DOCUMENT
     STS-50




     --------------------------------------------------------------
                                                                  |
                                                                  |
                                                                  |
                                                                  |
     JUNE 1992                                                    |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  | 
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
                                                                  |
NASA                                                              |
                                                                  |
National Aeronautics and                                          |
Space Administration                                              |
LYNDON B. JOHNSON SPACE CENTER                                    |
HOUSTON, TEXAS                                                    |
                                                              NSTS 17462-50
                                                                  Revision H


1.0    INTRODUCTION

11     Policy

This document defines explicitly, or by reference, the Space Shuttle
Program (5SP) authorized requirements to be implemented on the STS-50 flight.
Products generated to satisfy these requirements shall meet the schedules
defined in the Flight Definition and Requirements Directive, NSTS 07700,
volume III, and in the appropriate Payload Integration Plans (PIP's).

1.2    Flight Objective

The primary objective of this flight is to successfully perform the planned
operations of the United States Microgravity Laboratory (USML-1) payload.  The
secondary objectives of this flight are to perform the operations required by
the Investigations into Polymer Membrane Processing (IPMP), and the Shuttle
Amateur Radio Experiment II (SAREX-II) payloads.  An additional secondary
objective is to meet the requirements of the Ultraviolet Plume Instrument
(UVPI) which is manifested as a payload of opportunity.

1.3    Change Procedure

All changes to this document will be processed in accordance with the
procedures defined in the Mission Integration Control Board Configuration
Management Procedures, NSTS 18468.

2.0    APPLICABLE DOCUMENTS

The following documents, of the current issue (or as specified), are
applicable.

NSTS 07700     Flight Definition and Requirements Directive
Volume III     Ref:  Paragraph 1.1

NSTS 18468     Mission Integration Control Board Configuration Management
               Procedures
               Ref:  Paragraph 1.3

NSTS 16725     Flight Test and 5upplementary Objectives Document
               Ref:  Paragraphs 5.1 and 5.2

NSTS 21075     SIS Operational Flight Design Groundrules and Constraints
               (Level B)
               Ref:  Paragraph 3.1

JSC 08934      Shuttle Operational Data Book, Volume I
               Ref:  Paragraph 4.2

NSTS 21115     United States Microgravity Laboratory (USML) PIP and Annexes 1,
               2, 3, 4, 5, 6, 7, 8, and 9
               Ref:  Paragraph 3.2

NSTS 21133     investigations into Polymer Membrane Processing (IpMP) PIP and
               Annexes 2, 3, and 6
               Ref:  Paragraph 3.2
                                                               NSTS 17462-50
                                                                   Revision H


NSTS 21136     Shuttle Amateur Radio Experiment II (SAREX-II) PIP and Annexes
               1, 2, 3, 6, and 9
               Ref:  Paragraph 3.2

NSTS 21193     Ultraviolet Plume Instrument (UVPI) PIP
               Ref:  Paragraph 3.2

TDDPFSO        Trajectory Design Data Package
               Ref:  Paragraph 3.5

               Crew Compartment Configuration Drawing
               Ref:  Paragraph 3.2

               MECSLSI
               Ref:  Paragraph 3.2

3.0    PRIMARY FLIGHT REQUIREMENTS

Flight Definition and Requirements Directive (FDRD) controlled requirements are
indicated by an asterlsk (*).

3.1    General Flight Requirements
a.     Launch Date:  June 25, 1992                                          

b.     Launch Window:  The launch time on June 25, 1992, is 16:07 GMT.  The
       launch window is 3 hours and 7 minutes.  (Operationally limited to 2
       hours and 30 minutes based on crew-on-back constraint.)

       Detailed launch window information is included in the Flight Specific
       Flight Rules Annex.

c.     Launch Period:  The launch period opens on the End-of-Mission (EOM)
       lighted landing constraint and closes with the lighted landing
       constraint at the latest TAL (R0TA).  See Table-I - Launch Period/Launch
       Window.

                                      TABLE-I

                   Launch Period
                   & Launch Window Launch Window      Launch Period
       Date        Opening (GMT)       Closing (GMT)       Closing (GMT)
      6/23/92        16:06              19:14              19:25
      6/24/92        16:07              19:14              19:25
      6/25/92        16:07              19:14              19:25
      6/26/92        16:08              19:14              19:25
      6/27/92        16:08              19:14              19:25
      6/28/92        16:09              19:14              19:25
      6/29/92        16:09              19:15              19:25
      6/30/92        16:10              19:15              19:25
      7/01/92        16:11              19:15              19:25
      7/02/92        16:11              19:15              19:25
      7/03/92        16:12              19:15              19:25
      7/04/92        16:13              19:15              19:24
      7/05/92        16:13              19:15              19:24


                                         2
                                                               NSTS 17462-50
                                                                   Revision H



d.     Launch Site:  John F. Kennedy Space Center (KSC) Pad 39A, MLP3*.

e.     Inclination:  28.45 degrees-

f.     Altitude:  Insertion Altitude (Direct Insertion*) 160 NM-

g.     Space Shuttle Main Engine (SSME) Performance Plan:  104- nominal,
       104% intact abort.

h.     Crew Size:  7* (5 + 2 Payload Specialists) (Two shift operations will
       be required)

i.     Flight Duration:  Nominal 13 days-.  The capability will be provided for
       2 additional days for contingency operations and weather avoidance.

j.     Landing Sites:

       1.  Nominal EOM:
          Primary - EAFB, Alternates - KSC, WSSH

       2.  Aborts:

          (a)  Return To Launch Site (RTLS):  KSC

          (b)  Transoceanic Abort Landing (TAL):
               Primary- Banjul, Alternates- Ben Guerir, Rota (daylight TAL
               only)

          (c)  Abort Once Around (AOA):
               Primary- EAFB, Alternates- KSC, WSSH

          (d)  Emergency:  The Emergency Landing Sites (ELS) available for this
               flight are listed in the Flight Requirements Document Appendix
               A, Level A Groundrules and Constraints, current revision.

       Reference NSTS 07700 Volume 10, Appendix 10.17, for specific information
       on all Space Shuttle Landing Sites.

k.     Payload Ground Support Requirements:

       1.  Launch Site Support Requirements:

          (a)  Late installation of time-critical items into the middeck will
               be completed prior to L-14 hours.

          (b)  Middeck prelaunch power will be supplied to selected experiment
               equipment from L-24 hours until launch.

          (c)  The Generic Bioprocessing Apparatus (GBA) and Protein Crystal
               Growth (PCG) middeck experiments require sample replacement for
               launch delays of 48 hours or greater.  The Zeollte Crystal
               Growth (ZCG) middeck experiment requires sample replacement for
               launch delays of 72 hours or greater.  The Astroculture (ASC)
               middeck experiment must be removed and have water replaced for
               launch delays of 168 hours or greater.


                                         3
                                                               NSTS 17462-50
                                                                   Revision H


       2.  Landing Site Support Requirements:

          (a)  Primary Landing Site (PLS):

               (1)  USML-1 middeck experiment equipment is required to be
                    removed beginning at flight crew exit.

               (2)  Middeck power will be provided to PCG and GBA until
                    removal.

               (3)  Selected experiments will be removed from the Spacelab
                    module within 48 hours of landing.

          (b)  Alternate Landing Site (ALS) :  Same as PLS.

          (c)  Transoceanic Abort Landing (TAL):

               (1)  Middeck experiments will be removed and returned by the
                    SSP to KSC.

          (d)  Emergency Landing Site (ELS):  Same as TAL.

       3.  Flight Unique Ferry Requirements:

          (a)  For a planned overnight stopover where the ambient air
               temperature is less than 50 degrees Fahrenheit, a purge shall be
               provided within 2 hours of landing and maintained as late as
               possible prior to Shuttle Carrier Aircraft (SCA) take off.

       Note: Detailed handling requirements are controlled by the PIP and/or
       Annexes 8 and 9 for each payload.

l.     Groundrules and Constraints:  The flight unique groundrules and
       constraints are defined in the Level A Groundrules and Constraints,
       Appendix A, and published under separate cover.  The STS Operational
       Flight Design Groundrules and Constraints NSTS 21075, defines the
       standard Level B Groundrules and Constraints which are applicable,
       except for those additions or changes defined in Appendix A.

m.     Extravehicular Activity (EVA):  Crew provisions shall support the
       performance of the standard three two-crew member EVA's to accomplish
       the following unscheduled and contingency EVA requirements:

       1.  Perform a contingency EVA to realign the Ku-band antenna.

       2.  Perform a contingency EVA to close/latch the payload bay doors.

n.     Closed Circuit Television (CCTV) Requirements:

       1. Photographic and TV activities in the Spacelab module are required
          to support payload operations.  Crew procedures will be provided in
          the Payload Flight Data File (PFDF).




                                          4
                                                               NSTS 17462-50
                                                                   Revision H



       2. Photographic and TV support to the payload using payload bay
          equipment is required.  The requirements for Space Shuttle
          photographic and TV support will be defined in the Flight Planning
          Annex, Annex 2, Part II.

       3.  Documentary television requirements as specified in DSO 0901.

3.2    Cargo Requirements/Arrangement

a.     Cargo Requirements

       1.  Deployable
             (a) None  
      2.  Retrievable
             (a) None  
         3.  Attached  
           (a) USML-1                         - Reference PIP, NSTS 21115

          LBNP Countermeasures to Reduce Post-Space Flight Orthostatlc
          Intolerance, Blood Pressure Variability During Space Flight, and
          Environmental Monitoring - Microbial Air Sampler are carried as part
          of the USML-1 payload (DSO's 0478, 0602, 0611:  Reference NSTS
          16725).

       4.  Crew Compartment

          (a) Zeolite Crystal Growth (ZCG)    - Reference PIP, NSTS 21115
               Protein Crystal Growth (PEG),
               with three Refrigerator/Incubator
               Modules (R/IM's), Generic
               Bioprocessing Apparatus (GBA)
               with one R/IM, and Astroculture (ASC)

          Note:  The third PCG R/IM will be a Commerical Refrigerator
          Incubator Module (CRIM)

          (b) IPMP                            - Reference PIP, NSTS 21133
          (c) SAREX-II (Configuration E)      - Reference PIP, NSTS 21136

          The antenna plate for the overhead windows (W7/W8) will be flown.

          The following equipment will be shared with SAREX-II:  Orbiter
          Camcorder (CC), Electro Luminescent (EL) Payload General Support
          Computer (PGSC), EL PGSC battery pack, EL PGSC dc power,
          Microcassette recorder, Video Interface Unit (VIU)/Modified Version
          C (CM), CC Video/Power cable, VIU/CM-CC video cable, Monitor-VIU/CM
          cable, and VIU/Orbiter cable.



                                         5
                                                               NSTS 17462-50
                                                                   Revision H


       5.  No Hardware

          (a) UVPI (payload of opportunity,   - Reference PIP, NSTS 21193
               Special maneuvers/burns will
               not be performed)

b.     Cargo Arrangement:

       1.  Payload Bay                        - Reference MECSLSI VO72-
                                                 200115 (See Figure 1)

       2.  Crew Compartment                   - Reference Crew Compartment
                                                 Configuration Drawing No.
                                                 SGD321OO566

       Stowage requirements for manifested payloads can be found in the
       appropriate PIP's and Annex 6's.  Stowage requirements for DTO's and
       DSO's can be found in the Flight Test and Supplementary Objectives
       Document, NSTS 16725.  Unique stowage requirements for this flight are
       noted below:

          (a)  The following middeck payloads require approximate, flight-
               unique stowage as noted:

              SAREX-II (Configuration E)      -  75 lockers

          (b)  The following DTO's/DSO's require approximate, flight-unique
               stowage as noted:

               DTO 0658, Ergometer Vibration - 2.25 lockers
               Isolation System (EVIS) Evaluation

3.3    Space Shuttle Configuration Requirements

       The following lists the key unique Space Shuttle configuration/equipment
       requirements for this flight and that equipment which, for performance
       enhancement, is not Installed.

a.     Orbiter:  OV-1O2'

       1. Significant configuration/equipment required for flight requirements
          is as follows:

          (a)    Middeck Accommodations Rack (MAR)
          (b)    Middeck Utility Panel (MUP)
          (c)    Shuttle Orbiter Repackaged Galley (SORG)
          (d)    Regenerable CO2 Removal System (RCRS)
          (e)    EDO N2 Mission Kit - one
          (f)    EDO Pallet
          (g)    Cryo Tank Sets - four + four EDO (Tanks 1 and 2 offloaded) 1
          (h)    Payload Recorder
          (I)    Software Release OI-21
          (j)    Video Tape Recorder (VTR)




                                         6
                                                               NSTS 17462-50
                                                                   Revision H


          (k)    CCTV Cameras configured as follows:

          Location                        Lens

          A (Port, Fwd)        CCTV-508   Color Lens Assembly (CLA)
          B (Port, Aft)        CCTV-508   CLA
          C (Starboard, Aft)   CCTV-506   Monochrome Lens Assembly (MLA)
          D (Starboard, Fwd)   CCTV-508   Wide Angle Lens Assembly (WLA)

          (l)    Four-Tier Operational Sleep Stations
          (m)    Teleprinter and second roll of teleprinter paper (see note)
          (n)    Text And Graphics System (TAGS) and second roll of TAGS
                 paper (see note)
          (o)    Payload Bay Liner
          (p)    Ku-band Antenna
          (q)    Spacelab Utility Kit (SLUK)
          (r)    Long Spacelab Transfer Tunnel (SIT)
          (s)    Airlock Tunnel Adapter
          (t)    Port Generic Provisions Stowage Assembly (PSA)
          (u)    Ascent Air Data System (AADS)
          (v)    Aerodynamic Coefficient Instrumentation Package (ACIP)
          (w)    Airlock Stowage Bag
          (x)    Active Thermal Control System (ATCS) Radiator Kit
          (y)    NASA provided hardware - reference PIP, NSTS 21115, section
                 7.1
          (z)    Payload provided hardware - reference PIP, NSTS 21115,
                 section 7.2
          (aa)   Six Payload and General Support Computers (PGSC's)
                 1 - Orbiter primary
                 1 - Orbiter backup
                 3 - Spacelab DDS/PGSC's (1 is a spare)
                 1 - USML-1 dedicated PGSC
                 SAREX requires the shared use of a PGSC
          (bb)   359 pounds of hard ballast, located in the aft fuselage
          (cc)   Bicycle Ergometer (installed)
          (dd)   Two Color TV Monitors

          Note:  The second roll of Teleprinter and TAGS paper will be stowed
                 in the Spacelab module.

       2.  Significant equipment not installed:

          (a)    Remote Manipulator System (RMS), RMS Cabin Equipment
          (b)    Spare Manipulator Controller Interface Unit (MCIU)
          (c)    Spare Payload Data Interleaver (PDI)
          (d)    Treadmill

b.     External Tank (ET):  ET-50

c.     Solid Rocket Boosters (SRB's):  BI-051







                                         7
                                                               NSTS 17462-50
                                                                   Revision H


-c.    UVPI will receive state vectors real time.

4.2    Space Shuttle Placards/Constraints/Limitatlons

The following are constraints on this flight that are more restrictive than the
baseline design.  This does not necessarily reflect all constraints,
limitations, or placards on the Space Shuttle at this time but are those of
primary concern to this flight.  Reference should also be made to the Shuttle
Operational Data Book Volume I, JSC 08934, for standard placards and
constraints.

a.     None identified

5.0    SUPPLEMENTAL REQUIREMENTS

5.1    Development Test Objectives

The following Development Test Objectives (DT0's) are assigned to this flight:

       DTO 0236  Ascent Aerodynamic Distributed Loads Verification on OV-1O2
                 (Higher than nominal angle of attack)
     $ DTO 0251  Entry Aerodynamic Control Surfaces Test - Alternate Elevon
                 Schedule - Part 1 (if prop available)
       DTO O3O1D Ascent Structural Capability Evaluation
       DTO O3O7D Entry Structural Capability
       DTO 0312  ET TPS Performance (Methods 1 and 2)
       DTO O319D Shuttle/Payload Low Frequency Environment
       DTO 0413  On-Orbit PRSD Cryo H2 Boiloff
     $ DTO 0519  Carbon Brake System Test (Test Condition 5)
       DTO 0521  Orbiter Drag Chute System (Test 0)
       DTO 0623  Cabin Air Monitoring
       DTO 0655  Foot Restraint Evaluation
       DTO 0658  Ergometer Vibration Isolation System Evaluation
       DTO 0663  Acoustical Noise Dosimeter Data
       DTO 0665  Acoustical Noise Sound Level Data
       DTO 0666  Modify ECLSS Supply Air Ducting to Provide Chilled Air to
                 Suited Crewmembers
     $ DTO 0805  Crosswind Landing Performance (Runway selection will not be
                 based on DTO requirements)
       DTO 0910  OEX Orbital Acceleration Research Experiment (OARE)
                 (Priorities 2 and 3)[1]

A "D" suffix to a DTO number identifies it as a data only test.

[1] DTO 0910 Priority 2 requirements will be satisfied during the USML Space
Acceleration Measurement System (5AM5) maneuvers.  OARE will be active from
prelaunch through postlanding for up to a 13 + 2-day mission.

$ DTO of opportunity

The details of the DTO's assigned to this flight for implementation are
contained in the Flight Test and Supplementary Objectives Document,
NSTS 16725.




                                         9
                                                               NSTS 17462-50
                                                                   Revision H


5.2    Detailed Supplementary Objectives

The following Detailed Supplementary Objectives (DSO's) are assigned to this
flight:

       DSO 0314  OV-1O2 Acceleration Data Collection
       DSO 0472  Intraocular Pressure
       DSO 0474  Retinal Photography (The Canon LIA camcorder will be used for
                 no more than 2 minutes of video downlink)
     # DSO 0478  In-flight LBNP[1]
       DSO 0484  Assessment of Circadian Shifting in Astronauts by Bright
                 Light[3]
     # DSO 0602  Blood Pressure Variability During Space Flight[1]
     # DSO 0603  Orthostatic Function During Entry, Landing, and Egress (O6O3B
                 Schedule)
     # DSO 0605  Postural Equilibrium Control During Landing/Egress
     # DSO 0611  Air Monitoring Instrument Evaluation and Atmosphere
                 Characterization, Microbial Air Sampler (MAS)
                 (Configuration 2)[1]
     # DSO 0613  Changes in the Endocrine Regulation of Orthostatic Tolerance
                 Following Space Flight
     # DSO 0614  The Effect of Prolonged Space Flight on Head and Gaze
                 Stability During Locomotion
     # DSO 0617  Evaluation of Functional Skeletal Muscle Performance
                 Following Space Flight
     # DSO 0618  Effects of Intense Exercise During Space Flight on Aerobic
                 Capacity and Orthostatic Function[2]
     # DSO 0620  Physiological Evaluation of Astronaut Seat Egress Ability at
                 Wheels Stop
     # DSO 0621  In Flight Use of Florinef to Improve Orthostatic Intolerance
       DSO 0802  Educational Activities (Objective 1)
       DSO 0901  Documentary Television (Canon L1A Camcorder replaces in-cabin
                 CCTV camera)
       DSO 0902  Documentary Motion Picture Photography
       DSO 0903  Documentary Still Photography
       DSO 0904  Assessment of Human Factors

"#" Indicates Extended Duration Orbiter (EDO) buildup medical evaluation

[1] Carried as part of the USML-1 payload

[2] The requirement for the control group not to exercise within 36 hours of
landing has been waived.

[3] The data collection of blood pressure and heart rate in the L-7 timeframe
will be restricted to a total of 48 hours, of which only 24 hours will be
during the quarantine period.

The details of the DSO'S assigned to this flight for implementation are
contained in the Flight Test and Supplementary Objectives Document,
NSTS 16725, and in the Flight Data File Photo/TV Checklist.







                                         10
                                                               NSTS 17462-50
                                                                   Revision H


53     Data Collection

The Modular Auxiliary Data System (MADS) Pulse Code Modulation (PCM), MADS
wideband, and ACIP will be recorded during ascent and entry.  ACIP and High
Resolution Accelerometer Package (Hi RAP) data will be recorded during selected
intervals on orbit in support of DSO 0314 and DTO 0910.  All of these data will
be recorded on the Orbiter Experiments (OEX) recorder.

6.0    PRIORITIES

These priorities are established to provide guidance for premission planning
and real-time rescheduling in the event of anomalies or operational
considerations that preclude the accomplishment of all planned requirements.

6.1    Generalized Priorities

(1)  USML-1
(2)  DSO 0904  (SL Module Acoustic Measurements)
(3)  IPMP
(4)  SAREX-II
(5)  EDO DSO's
(6)  DTO's
(7)  DSO's
(8)  UVPI - Payload of Opportunity






























                                         11

