Universal Licensing System
KNHX475
SCHLUMBERGER PERFORATING CENTER
License details
| ULS identifier | 1626963 |
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| Call sign | KNHX475 |
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| Radio service | IG |
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| Status | T |
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| Grant date | 2003-08-21 |
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| Expiration | 2013-11-18 |
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| Cancellation | 2004-06-10 |
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| Frequency range | 461.225 - 466.225 MHz (2 frequencies) |
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| Locations | 3 |
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| Representative location | FRIENDSWOOD, GALVESTON, TX |
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| Coordinates | 29.4660556, -95.2232778 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:25:23 |
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Licensee
| Name | SCHLUMBERGER PERFORATING CENTER |
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| Applicant type | C |
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| FRN | 0009397282 |
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| Location | ROSHARON, TX |
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| Address | ROSHARON, TX, 77583 |
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| Phone | 7134310357 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
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| 1 | 1 | FB4 | 461.22500000 | | | 110.000000 | 129.000000 | |
| 3 | 1 | MO | 461.22500000 | | | 20.000000 | | |
| 2 | 1 | FX1 | 466.22500000 | | | 20.000000 | | |
| 3 | 1 | MO | 466.22500000 | | | 20.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 461.22500000 | | 20K0F3E |
| 3 | 1 | 461.22500000 | | 20K0F3E |
| 2 | 1 | 466.22500000 | | 20K0F3E |
| 3 | 1 | 466.22500000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 3 MI NNE ALVIN TX NEAR FM 528, FRIENDSWOOD, GALVESTON, TX | 29.46605556, -95.22327778 | 11.000 m | | | N |
| 2 | T | TX | | | | | |
| 3 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 152.000 m | | | | | |
| 1 | 2 | T | | | | | | | |
| 1 | 3 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 14910 AIRLINE RD, ROSHARON, TX | | 7134310357 |
License history
| Date | File or call sign | Action |
|---|
| 2004-06-23 | KNHX475 | PNACT |
| 2004-06-10 | KNHX475 | LETACS |
| 2004-06-10 | KNHX475 | LITERM |
| 2003-08-21 | KNHX475 | LIREN |
| 2000-11-23 | KNHX475 | LICCNV |
| 1998-10-27 | KNHX475 | AUTHPR |
| 1998-10-27 | KNHX475 | LIREN |
| KNHX475 | AUDCAN |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1626963 | 2026-08-02 01:25:23 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | KNHX475 | ULS 1626963 | 2026-08-02 01:25:23 |
| Status | T | ULS 1626963 | 2026-08-02 01:25:23 |
| Service | IG | ULS 1626963 | 2026-08-02 01:25:23 |
| Grant Date | 2003-08-21 | ULS 1626963 | 2026-08-02 01:25:23 |
| Expiration Date | 2013-11-18 | ULS 1626963 | 2026-08-02 01:25:23 |
| Cancellation Date | 2004-06-10 | ULS 1626963 | 2026-08-02 01:25:23 |