Exhibit 6 Akash MCNAIR ODAR v2 with signature

1288-EX-ST-2018 Text Documents

Akash Systems, Inc.

2018-07-18ELS_213038

July 18, 2018

    Exhibit 6: Akash MCNAIR Orbital Debris Assessment Report (ODAR)


   1. Scope
This report summarizes the analyses performed to assess orbital debris for Akash’s MCNAIR
satellite and its compliance with requirements established by the NASA Orbital Debris
Program Office (OPDO). This report does not cover potential debris from the launch vehicle.

The analysis uses Debris Assessment Software provided by the NASA OPDO and follows the
requirement structure of the Process for Limiting Orbital Debris, NASA-STD 8719.14A. The
MCNAIR analysis was performed using version DAS 2.1.1 provided by the OPDO at NASA’s
Johnson Space Center (JSC). This analysis complies with the methodology described in
Section 1.1.3 of NS 8719.14A: “1.1.3 This document, along with the associated current version
of Debris Assessment Software (DAS) or the higher fidelity Object Reentry Survival Analysis
Tool (ORSAT), provided by the NASA Orbital Debris Program Office (NASA ODPO) located
at Johnson Space Center (JSC), shall be used by the program or project manager as the
primary reference in conducting orbital debris assessments (Requirement 56244).”


   2. Mission Design
   2.1 Mission Description
A complete Mission Description is provided in Exhibit 1 of Akash’s MCNAIR STA
Application.

It is important to note that Akash has no plans to intentionally release debris during nominal
satellite operations, and that MCNAIR has been designed without propulsion and, therefore,
no pressure vessels are on-board. Before launch, Akash will designate a point of contact for
receiving JSpOC conjunction assessments, and plans for collision avoidance activities will be
developed if necessary. Additionally, MCNAIR does have the ability, upon receipt of a ground
command, to orient itself at a given altitude in order to vary its cross-sectional area in the
vector of motion.

In terms of foreign government or space agency participation, The Akash satellite, MCNAIR,
has not received support of any form from any foreign government or space agency.

   2.2 Spacecraft Description
MCNAIR is a 3-axis controlled, 12U CubeSat designed for use in a low earth orbit (LEO) with
two deployed, non-articulating solar arrays. There is also a deployed Ka-band antenna and
an S-band patch antenna. The total spacecraft mass (and dry mass) is 19.9 kg. The
dimensions of the 12U spacecraft are 23.9 cm x 22.9 cm x 36.6 cm in the stowed configuration.
This does not include the stowed Ka-band parabolic antenna which is fixed to the nadir facing
wall, and measures 16.6 cm in height and 10.4 cm in diameter. When fully deployed, the Ka-

         Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                                Email: info@akashsystemsinc.com


band antenna extends approximately 34 cm in height and 51 cm in diameter, the two
deployed solar arrays have a dimension of 30 cm x 40 cm each.

The 3-axis inertial pointing system contains three reaction wheel assemblies, three torque
rods, two miniaturized star trackers, and a processor board. The MCNAIR bus battery is
capable of 100 Watt-hr, and has charge control, power distribution and fault protection. The
payload battery consists of 24 cells, providing 300 Watt-hr at 28V.

All sensors on MCNAIR are passive and there are no lasers, propellants, radioactive,
pyrotechnic devices, pressure vessels, or other hazardous materials on board the spacecraft.


   3. Orbit Lifetime
NASA requires the disposal of spacecraft through one of three methods; 1) atmospheric
reentry within 25 years of Mission completion or 30 years from launch, maneuver the
spacecraft for a controlled reentry, 2) maneuver the spacecraft into a storage orbit, or 3) direct
retrieval. MCNAIR will meet NS 8719.14 through atmospheric reentry within 25 years
mission completion [(Requirement 4.6-1) - Disposal for space structures passing through LEO:
A spacecraft or orbital stage with a perigee altitude below 2000 km shall be disposed of by one
of three methods: a. Atmospheric reentry option: (1) Leave the space structure in an orbit in
which natural forces will lead to atmospheric reentry within 25 years after the completion of
mission but no more than 30 years after launch; or…].

For the orbital lifetime analysis, an initial orbit of 500 x 500 km altitude and 97.8 degrees
inclination was input into the DAS software. The software was also used to calculate the
cross sectional area of the spacecraft for random tumbling and a detailed mass budget was
used to accurately estimate the fully integrated spacecraft mass.

For a fully deployed configuration, a 5552.48 cm2 cross sectional area was estimated using
the “Calculate the Cross Sectional Area” in the DAS Science and Engineering toolbox. Since
the spacecraft mass is 19.9 kg, the area-to-mass ratio is 0.0279 m2/kg for MCNAIR (in the
fully deployed configuration). In this configuration, re-entry would occur after 2.075 years.

While it is highly unlikely for both the solar arrays and the Ka-band antenna to not deploy,
analysis was conducted for a fully stowed configuration as well. For a fully stowed
configuration, the area-to-mass ratio is 0.00637 m2/kg, and the spacecraft would reenter in
4.068 years. The inputs to the calculation and the orbit history for a (a) fully deployed and
(b) fully stowed configuration are shown in Figure 1 (a,b).




         Akash Systems, Inc.    * 600 California St., Floor 11 * San Francisco, CA 94109
                                 Email: info@akashsystemsinc.com


                    (a) Fully Deployed                                 (b) Fully Stowed
  Figure 1(a,b). Inputs and Outputs to the Orbital Lifetime / Dwell Time Calculation for a (a) fully
                       deployed configuration and (b) fully stowed configuration

Therefore, the worst-case orbit dwell time for a 500 km sun-synchronous orbit is 4.068 years,
meeting requirement 8719.14 through atmospheric reentry within 25 years of mission
completion or 30 years from launch. However, it is important to note that the plan is to re-
enter in the fully deployed configuration, and therefore re-enter within 2.075 years.

Additionally, sun synchronous orbits at 400 km and 600 km, were also run in both the fully
deployed and fully stowed configuration. Successfully reentry was found to occur for both of
these orbits, and in both of the configurations. The worst-case scenario occurs at 600 km fully
stowed, which has an orbit lifetime of 23.584 years.


   4. Orbital Debris Requirements
Requirements associated with the risk of human casualty from reentering space hardware
are contained in NS 8719.14A, requirement 4.7-1: [Limit the risk of human casualty: The
potential for human casualty is assumed for any object with an impacting kinetic energy in
excess of 15 Joules: a) For uncontrolled reentry, the risk of human casualty from surviving
debris shall not exceed 0.0001 (1:10,000)…]

All analyses contained in the DAS 2.1.1 Requirements Assessment tools were successfully
performed with the exception of collision hazards from space tethers. There are no tethers on
MCNAIR.

   4.1 Model Construction
In order to calculate the risk of human casualty, the arrangement of each space structure
element is defined to assess its reentry survival potential. Based on empirical and theoretical
         Akash Systems, Inc.     * 600 California St., Floor 11 * San Francisco, CA 94109
                                  Email: info@akashsystemsinc.com


values, the outermost structure (i.e. the “parent” object) is assumed to break apart at an
altitude of 78 km. The first level of “child” objects is exposed at this point. The objects are
then subjected to the various forces of the reentry model. If a child object is destroyed
(“demises”) due to the reentry forces, it does not affect the final casualty area calculation. If
a child object contains further levels of children, those children are exposed at the same point
at which their immediate parent is exposed.

MCNAIR components and their physical properties were inserted into the object tree with
sub-items (child objects) nested to match the mechanical design of the system. The root level
(0th) object for the object tree is the MCNAIR structure. The first level of child objects
contains the thermal structures, avionics box, solar arrays, batteries, the Akash transmitter
and the associated antenna.


   4.2    Orbital Debris Analysis Results
A summary of the orbital debris analyses results is shown in Figure 2. MCNAIR is compliant
with NS 8719.14A – Process for Limiting Orbital Debris. There are no tethers on MCNAIR.




                 Figure 2. MCNAIR Compliance with Orbital Debris Requirements

Numerical results for the risk of human casualty for the total mission is shown in Figure 3.
The risk of human casualty is “1:49900” and the total casualty area is 1.79m2. The nonzero
casualty area is produced by the solar panels alone. The spacecraft and all of its internal
components oblate with a risk to human casualty that is compliant with Requirement 4.7-1,
which states that “For uncontrolled reentry, the risk of human casualty from surviving debris
shall not exceed 0.0001 (1:10,000)”.




         Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                                Email: info@akashsystemsinc.com


                               Figure 3. MCNAIR Risk of Human Casualty



   5. Summary
An orbital debris analysis found the MCNAIR 12U CubeSat mission to be compliant with the
applicable requirements for spacecraft disposal and risk to human casualty c ontained in
NASA STD 8719.14A. The analysis uses Debris Assessment Software provided by the NASA
ODPO and follows the requirement structure of the Process for Limiting Orbital Debris,
NASA-STD 8719.14A. On October 1, 2019, MCNAIR will be launched into a 500 km altitude,
97.8 degree inclination orbit and spacecraft disposal is accomplished through atmospheric
reentry. The spacecraft is estimated to reenter in 4.068 years (fully stowed configuration) and
2.075 years (fully deployed configuration) and is compliant with the requirement to reenter
within 25 years after mission completion or 30 years after launch.

The inputs to the DAS object tree (spacecraft model) were nested according to the users guide
to provide a realistic reentry model and used the standard materials database provided in
the application.

MCNAIR meets all applicable requirements for the process of limiting orbital debris.

   6. Appendix
**INPUT**

       Start Year = 2019.833000 (yr)
       Perigee Altitude = 500.000000 (km)
       Apogee Altitude = 500.000000 (km)
       Inclination = 97.800000 (deg)
       RAAN = 0.000000 (deg)
       Argument of Perigee = 0.000000 (deg)
       Area-To-Mass Ratio = 0.027902 (m^2/kg)

**OUTPUT**
         Akash Systems, Inc.       * 600 California St., Floor 11 * San Francisco, CA 94109
                                    Email: info@akashsystemsinc.com


            Orbital Lifetime from Startyr = 2.075291 (yr)
            Time Spent in LEO during Lifetime = 2.075291 (yr)
            Last year of Propagation = 2021 (yr)


**INPUT**

            Start Year = 2019.833000 (yr)
            Perigee Altitude = 500.000000 (km)
            Apogee Altitude = 500.000000 (km)
            Inclination = 97.800000 (deg)
            RAAN = 0.000000 (deg)
            Argument of Perigee = 0.000000 (deg)
            Area-To-Mass Ratio = 0.006370 (m^2/kg)

**OUTPUT**

            Orbital Lifetime from Startyr = 4.068446 (yr)
            Time Spent in LEO during Lifetime = 4.068446 (yr)
            Last year of Propagation = 2023 (yr)

----------------------------------------------------------
07 12 2018; 16:37:00PM
Processing Requirement 4.3-2: Return Status: Passed
=============== End of Requirement 4.3-2 ===============


07 12 2018; 16:37:03PM Requirement 4.4-3: Compliant
=============== End of Requirement 4.4-3 ===============


07 12 2018; 16:44:46PM Processing Requirement 4.5-1: Return Status: Passed
==============
Run Data
==============

**INPUT**

            Space Structure Name = Akash
            Space Structure Type = Payload
            Perigee Altitude = 500.000000 (km)
            Apogee Altitude = 500.000000 (km)
            Inclination = 97.800000 (deg)
            RAAN = 0.000000 (deg)
            Argument of Perigee = 0.000000 (deg)
            Mean Anomaly = 0.000000 (deg)
            Final Area-To-Mass Ratio = 0.027900 (m^2/kg)
            Start Year = 2019.833000 (yr)
            Initial Mass = 19.900000 (kg)
            Final Mass = 19.900000 (kg)

               Akash Systems, Inc.                 * 600 California St., Floor 11 * San Francisco, CA 94109
                                                    Email: info@akashsystemsinc.com


     Duration = 0.500000 (yr)
     Station-Kept = False
     Abandoned = True
     PMD Perigee Altitude = -1.000000 (km)
     PMD Apogee Altitude = -1.000000 (km)
     PMD Inclination = 0.000000 (deg)
     PMD RAAN = 0.000000 (deg)
     PMD Argument of Perigee = 0.000000 (deg)
     PMD Mean Anomaly = 0.000000 (deg)

**OUTPUT**

      Collision Probability = 0.000002
      Returned Error Message: Normal Processing
      Date Range Error Message: Normal Date Range
      Status = Pass
=============== End of Requirement 4.5-1 ===============

07 12 2018; 16:45:51PM
Processing Requirement 4.6        Return Status:       Passed

==============
Project Data
==============

**INPUT**

     Space Structure Name = Akash
     Space Structure Type = Payload

     Perigee Altitude = 500.000000 (km)
     Apogee Altitude = 500.000000 (km)
     Inclination = 97.800000 (deg)
     RAAN = 0.000000 (deg)
     Argument of Perigee = 0.000000 (deg)
     Mean Anomaly = 0.000000 (deg)
     Area-To-Mass Ratio = 0.027900 (m^2/kg)
     Start Year = 2019.833000 (yr)
     Initial Mass = 19.900000 (kg)
     Final Mass = 19.900000 (kg)
     Duration = 0.500000 (yr)
     Station Kept = False
     Abandoned = True
     PMD Perigee Altitude = 486.384674 (km)
     PMD Apogee Altitude = 510.419690 (km)
     PMD Inclination = 97.783203 (deg)
     PMD RAAN = 188.805122 (deg)
     PMD Argument of Perigee = 52.099452 (deg)
     PMD Mean Anomaly = 0.000000 (deg)

**OUTPUT**

       Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                              Email: info@akashsystemsinc.com


     Suggested Perigee Altitude = 486.384674 (km)
     Suggested Apogee Altitude = 510.419690 (km)
     Returned Error Message = Passes LEO reentry orbit criteria.

      Released Year = 2021 (yr)
      Requirement = 61
      Compliance Status = Pass
=============== End of Requirement 4.6 ===============


***********INPUT****
 Item Number = 1

name = Akash
quantity = 1
parent = 0
materialID = 5
type = Box
Aero Mass = 19.900000
Thermal Mass = 19.900000
Diameter/Width = 0.500000
Length = 0.721000
Height = 0.300000

name = X Radiator Panels
quantity = 2
parent = 1
materialID = 8
type = Flat Plate
Aero Mass = 0.620000
Thermal Mass = 0.620000
Diameter/Width = 0.200000
Length = 0.300000

name = Y Radiator Panels
quantity = 2
parent = 1
materialID = 8
type = Flat Plate
Aero Mass = 0.620000
Thermal Mass = 0.620000
Diameter/Width = 0.200000
Length = 0.300000

name = Avionics Box
quantity = 1
parent = 1
materialID = 8
type = Box
Aero Mass = 4.820000

       Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                              Email: info@akashsystemsinc.com


Thermal Mass = 4.820000
Diameter/Width = 0.200000
Length = 0.200000
Height = 0.100000

name = Solar Array Panels
quantity = 2
parent = 1
materialID = 24
type = Flat Plate
Aero Mass = 1.500000
Thermal Mass = 1.500000
Diameter/Width = 0.300000
Length = 0.400000

name = Akash Transmitter
quantity = 1
parent = 1
materialID = 8
type = Box
Aero Mass = 5.000000
Thermal Mass = 5.000000
Diameter/Width = 0.200000
Length = 0.300000
Height = 0.100000

name = Payload Battery
quantity = 1
parent = 1
materialID = 8
type = Box
Aero Mass = 1.500000
Thermal Mass = 1.500000
Diameter/Width = 0.100000
Length = 0.150000
Height = 0.100000

name = Bus Battery
quantity = 1
parent = 1
materialID = 8
type = Box
Aero Mass = 0.750000
Thermal Mass = 0.750000
Diameter/Width = 0.065000
Length = 0.147000
Height = 0.037000

name = Akash Antenna
quantity = 1
parent = 1

       Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                              Email: info@akashsystemsinc.com


materialID = 8
type = Cylinder
Aero Mass = 1.500000
Thermal Mass = 1.500000
Diameter/Width = 0.116600
Length = 0.500000

**************OUTPUT****
Item Number = 1

name =   Akash
Demise   Altitude = 77.994820
Debris   Casualty Area = 0.000000
Impact   Kinetic Energy = 0.000000

*************************************
name = X Radiator Panels
Demise Altitude = 73.681236
Debris Casualty Area = 0.000000
Impact Kinetic Energy = 0.000000

*************************************
name = Y Radiator Panels
Demise Altitude = 73.681236
Debris Casualty Area = 0.000000
Impact Kinetic Energy = 0.000000

*************************************
name = Avionics Box
Demise Altitude = 54.511780
Debris Casualty Area = 0.000000
Impact Kinetic Energy = 0.000000

*************************************
name = Solar Array Panels
Demise Altitude = 0.000000
Debris Casualty Area = 1.791384
Impact Kinetic Energy = 306.250244

*************************************
name = Akash Transmitter
Demise Altitude = 60.755245
Debris Casualty Area = 0.000000
Impact Kinetic Energy = 0.000000

*************************************
name = Payload Battery
Demise Altitude = 67.506790
Debris Casualty Area = 0.000000
Impact Kinetic Energy = 0.000000


         Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                                Email: info@akashsystemsinc.com


*************************************
name = Bus Battery
Demise Altitude = 68.241615
Debris Casualty Area = 0.000000
Impact Kinetic Energy = 0.000000

*************************************
name = Akash Antenna
Demise Altitude = 72.775955
Debris Casualty Area = 0.000000
Impact Kinetic Energy = 0.000000

*************************************

=============== End of Requirement 4.7-1 ===============




       Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                              Email: info@akashsystemsinc.com


Submitted By:

Whitney Lohmeyer
Whitney Lohmeyer
Regulatory Consultant, Lohmeyer Consulting LLC




        Akash Systems, Inc.   * 600 California St., Floor 11 * San Francisco, CA 94109
                               Email: info@akashsystemsinc.com



Document Created: 2018-07-18 14:46:29
Document Modified: 2018-07-18 14:46:29

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC