STEP-0

STPSat
and related
series

STPSat-1
STEP-0STPSat-1

This page contains philatelic information on Space Test Program SATellite (STPSat) series. Catalog numbers, years of issue, and notes on the satellites featured are given when available. If readers know of additional information or images, please contact the authors using the e-mail addresses at the bottom of this page.

Launch information
(found elsewhere)
Launch covers
(including anniversary-of-launch covers, and launch-related event covers)
(farther below)
Other postal items
(stamps, souvenir sheets, aerogrammes, postal cards, etc.)
(immediately below)
STEP
(USAF)
STEP
(USAF)
STEP
(USAF)
STPSat
(USAF)
STPSat
(USAF)
STPSat
(USAF)
STPSat (on other than STPSat launch covers)
STP-H
(USAF)
STP-H
(USAF)
STP-H
(USAF)


Below is a list of STPSat-series postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).

CountryCatalog NumberType of ItemYear of IssueNotes on Content
Space Test Experiment Platform (STEP) (USAF)
Guyana3504c (Mi6966)
i3504c
One of MS6 (3504 (a-f)) (Mi6964-6969)
One of imperforate MS6 (i3504 (a-f))
2000STEP-0 / "TAOS"
Guyana3504 fdcMS6 on FDC
Space Test Program SATellite (STPSat) (USAF)
No (non-launch cover) postal items found
Space Test Program - Houston (STP-H) (USAF)
No (non-launch cover) postal items found


Below is a list of STPSat-series launch covers (including anniversary-of-launch covers, and launch-related event covers).

CountryCancel DateCancel LocationType of ItemNotes on Content
Space Test Experiment Platform (STEP) (USAF)
1997-10-22: STEP-4
United States1997-10-22Wallops Island VA(Multi-color printed) cachet on coverSTEP-4 launch
Space Test Program SATellite (STPSat) (USAF)
2006-03-24: STPSat-1 (and FalconSat-3)
No launch cover images available yet
2010-11-20: STPSat-2 (and OSCAR-69/70 and FalconSat-5 and others)
No launch cover images available yet
2013-11-20: STPSat-3 (and OSCAR-75 and ORS-3 and others)
United States2013-11-19Wallops Island VA(Multi-color printed) cachet on coverSTPSat-3 launch
2019-11-02 (launched to ISS) [with Cygnus-CRS-12]
2020-01-28 (deployed from ISS): STPSat-4 (and OSCAR-107 and AeroCube-14A/14B/15A/15B and others)
United States2019-11-02Wallops Island VA(Ranski) cachet on coverCygnus-CRS-12 launch (with STPSat-4 and others)
United States2020-01-28Houston TX(ISS Mission Control Station) cancel and (Red Eagle) cachet on coverSTPSat-4 deployed from the ISS
United States2020-01-31Houston TX(ISS Mission Control Station) cancel and (Red Eagle) cachet on coverCygnus-CRS-12 un-docking from the ISS and deploying 4 other sub-satellites
2018-12-03: STPSat-5 (and FalconSat-6 and SkySat-14/15 and ORS-7A/7B and Flock-3s-1/2/3 and OSCAR-95/96/97 and others)
United States2018-12-03Vandenberg AFB, CA(Lollini) cachet on coverSTPSat-5 launch
United States2018-12-03Vandenberg AFB, CA(Red Eagle) cachet on coverSTPSat-5 launch
2021-12-07: STPSat-6 (and LDPE-1 and Ascent)
United States2021-12-07Kennedy Space Center FL(Ranski) cachet on cover, also backSTPSat-6 launch
United States2021-12-07Cape Canaveral FL(Ranski) cachet on cover, also backSTPSat-6 launch
United States2021-12-07Cape Canaveral FL(Lollini) cachet on coverSTPSat-6 launch
STPSat (on other than STPSat launch covers)
United States2022-01-31Cape Canaveral FL(Red Eagle) cachet on CSG-2 launch cover"STP-2" (STPSat-2)
Space Test Program - Houston (STP-H) (USAF)
2019-05-04 (launched to ISS) [with Dragon-CRS-17]
2019-? (attached to ISS): STP-H6 and OCO-3 (and others)
United States2019-05-04Hawthorne CA(Red Eagle) cachet on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-04Kennedy Space Center FL(Red Eagle) cachet on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-04Houston TX(Ranski) cachet on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-04Cape Canaveral FL(Ranski) cachet on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-04Cape Canaveral FL(Ranski) cachet (different) on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-04Kennedy Space Center FL(Ranski) cachet on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-04Kennedy Space Center FL(Ranski) cachet (different) on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-04Houston TX(Ranski) cachet on coverDragon-CRS-17 launch (with STP-H6 and others)
United States2019-05-06Kennedy Space Center FL(Red Eagle) cachet on coverDragon-CRS-17 docking with the ISS (with STP-H6 and others)
STP-H7 and TEMPEST-D_copy / STP-H8 (pre-launch events) (and others)
United States2021-12-15Kennedy Space Center FL(Red Eagle) cachet on coverDragon-CRS-24 pre-launch: "Static fire test"
2021-12-21 (launched to ISS) [with Dragon-CRS-24]
2021-? (attached to ISS): STP-H7 and TEMPEST-D_copy / STP-H8 (and others)
United States2021-12-21Kennedy Space Center FL(Multi-color printed) cachet on coverDragon-CRS-24 launch (with STP-H7 and TEMPEST-D_copy / STP-H8 and others)
United States2021-12-21Houston TX(ISS Mission Control Station) cancel and (Red Eagle) cachet on coverDragon-CRS-24 docking with the ISS (with STP-H7 and TEMPEST-D_copy / STP-H8 and others)


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Updated: 2023-12-10