FEDERAL COMMUNICATIONS COMMISSION APPLICATION FOR SPECIAL TEMPORARY AUTHORITY

Applicant Name

Name of Applicant:

Northrop Grumman Systems Corporation

Address

Attention:	DS LAW PLLC
Street Address:	1629 K St NW Ste 300
P.O. Box:
City:	Washington
State:	DC
Zip Code:	20006-1631
Country:
E-Mail Address:	david@davidsiddall-law.com

Best Contact

Give the following information of person who can best handle inquiries pertaining to this application:   Last Name: Hall First Name: John Title: Staff Engineer - RF/Comm. Systems Phone Number: 703-234-9057

Explanation

Please explain in the area below why an STA is necessary: This request is for a two-month extension of existing STA call sign WU9XHC, FCC File No. 1172-EX-ST-2022. This extension is due to an extension of the berthed phase of the NG-18 mission at the request of NASA in order to support cargo logistics activities and a potential reboost of the ISS. NASA contact is contained in the Exhibit attached to this application. Northrop Grumman Systems Corporation (NGSC) launched and operates the NG-18 Cygnus spacecraft as part of the NASA Commercial Resupply Services 2 (CRS2) program. Cygnus spacecraft telemetry is transmitted during all phases of the mission. An STA is required for the Cygnus spacecraft due to the short duration of the mission and because of the need for frequency coordination among users of the applicable frequency bands. This STA application is consistent with FCC/NTIA policies and is similar to STA applications submitted for previous Cygnus spacecraft.

Purpose of Operation

Please explain the purpose of operation:

Spacecraft telemetry links are for monitoring of Cygnus spacecraft state of health. Telemetry links include: • S-Band Single Access (SSA) and S-Band Multiple Access (SMA) spread spectrum return link operation with NASA TDRS. • High data rate downlink operation with mission Ground Stations • Cygnus to ISS link for proximity operations will be used during the mission. The transmitters supporting these links are described below: The Cygnus spacecraft configuration will comprise of two L-3 Cincinnati Electronics (L-3 CE) transmitters (primary & redundant-backup) operating at 2287.5 MHz in TDRS mode and it will also provide telemetry downlinks at 3 Mbps and 6 Mbps. Two additional transmitters (primary & redundant-backup), also procured from L-3 CE, operating at 2203.2 MHz will be used for the Cygnus to ISS proximity communication link. These transmitters will meet all STA parameters and conditions as compiled with previous CRS STA applications.

Information

Callsign:	WU9XHC
Class of Station:	MO
Nature of Service:	Experimental

Requested Period of Operation

Operation Start Date:	04/09/2023
Operation End Date:	06/09/2023

Manufacturer

List below transmitting equipment to be installed (if experimental, so state) if additional rows are required, please submit equipment list as an exhibit:
Manufacturer	Model Number	No. Of Units	Experimental
L-3Harris Cincinnati Electronics	6354-PF4520-05	2	Yes
L-3Harris Cincinnati Electronics	6354-PF4520-06	2	Yes

Certification

Neither the applicant nor any other party to the application is subject to a denial of Federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. Section 862, because of a conviction for possession or distribution of a controlled substance. The applicant hereby waives any claim to the use of any particular frequency or electromagnetic spectrum as against the regulatory power of the United States because of the prvious use of the same, whether by license or otherwise, and requests authorization in accordance with this application. (See Section 304 of the Communications Act of 1934, as amended.) The applicant acknowledges that all statements made in this application and attached exhibits are considered material representations, and that all the exhibits part hereof and are incorporated herein as if set out in full in this application; undersigned certifies that all statements in this application are true, complete and correct to the best of his/her knowledge and belief and are made in good faith. Applicant certifies that construction of the station would NOT be an action which is likely to have a significant environmental effect. See the Commission's Rules, 47 CFR1.1301-1.1319.

Signature of Applicant (Authorized person filing form):	John Hall
Title of Applicant (if any):	Staff Engineer - RF/Comm Systems
Date:	2023-02-27 00:00:00.0

Station Location

	City	State	Latitude	Longitude	Mobile	Radius of Operation
			North	West	Spacecraft-415km altitude-51.6 degrees inclination

Datum:  NAD 83 Is a directional antenna (other than radar) used?   No Exhibit submitted:   No (a) Width of beam in degrees at the half-power point:   (b) Orientation in horizontal plane:   (c) Orientation in vertical plane:   Will the antenna extend more than 6 meters above the ground, or if mounted on an existing building, will it extend more than 6 meters above the building, or will the proposed antenna be mounted on an existing structure other than a building?   No (a) Overall height above ground to tip of antenna in meters:   (b) Elevation of ground at antenna site above mean sea level in meters:   (c) Distance to nearest aircraft landing area in kilometers:   (d) List any natural formations of existing man-made structures (hills, trees, water tanks, towers, etc.) which, in the opinion of the applicant, would tend to shield the antenna from aircraft:

Action	Frequency	Station Class	Output Power/ERP	Mean Peak	Frequency Tolerance (+/-)	Emission Designator	Modulating Signal
Modified	2203.20000000- MHz	MO	15.670000 W 4.980000 W	M	0.00008000 %	5M93G1D	SQPN

Action	Frequency	Station Class	Output Power/ERP	Mean Peak	Frequency Tolerance (+/-)	Emission Designator	Modulating Signal
Modified	2287.50000000- MHz	MO	22.860000 W 6.340000 W	M	0.00018000 %	6M16G1D	SQPN

Action	Frequency	Station Class	Output Power/ERP	Mean Peak	Frequency Tolerance (+/-)	Emission Designator	Modulating Signal
Modified	2287.50000000- MHz	MO	14.520000 W 4.030000 W	M	0.00018000 %	6M16G1D	SQPN

Action	Frequency	Station Class	Output Power/ERP	Mean Peak	Frequency Tolerance (+/-)	Emission Designator	Modulating Signal
Modified	2287.50000000- MHz	MO	14.520000 W 4.030000 W	M	0.00018000 %	3M00G1D	SQPSK

Action	Frequency	Station Class	Output Power/ERP	Mean Peak	Frequency Tolerance (+/-)	Emission Designator	Modulating Signal
Modified	2287.50000000- MHz	MO	14.520000 W 4.030000 W	M	0.00018000 %	4M98G1D	SQPSK