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Information
about STEREO-A close approach to Earth, August 2023
STEREO Coordinated Observations Calendar - 2015
Below, please find the archived plans for STEREO operations in the year 2015.
Some unplanned events are also included.
All dates and times are UTC unless otherwise specified. More detailed plans
can be found in the weekly schedules (Ahead,
Behind).
This page is also available as plain text.
Information about reduced science operations during the solar conjunction
period between August 2014 and November 2015 can be found
here.
-------------------------------------------------------------------------------
Scheduled activities for Week 01:
M Dec 29 (363)
T Dec 30 (364)
W Dec 31 (365)
T Jan 01 (001) New Year
F Jan 02 (002)
S Jan 03 (003)
S Jan 04 (004) Ahead: Update HGA angle bias for second side lobe operations.
Behind: Test of phasing together stations 14 and 25
Notes:
* Ahead operating on first side lobe, in SWAVES-prime mode.
-------------------------------------------------------------------------------
Scheduled activities for Week 02:
M Jan 05 (005) Ahead: Start of second side operations.
T Jan 06 (006) Ahead: Momentum dump, 13:00 UT
W Jan 07 (007)
T Jan 08 (008)
F Jan 09 (009)
S Jan 10 (010)
S Jan 11 (011)
Notes:
* Ahead operating on second side lobe.
-------------------------------------------------------------------------------
Scheduled activities for Week 03:
M Jan 12 (012) Ahead: Test of SECCHI telem. during SSR playback, 15:50-17:50
T Jan 13 (013)
W Jan 14 (014)
T Jan 15 (015)
F Jan 16 (016)
S Jan 17 (017) Ahead: Test of SECCHI telem. during SSR playback, 05:00-07:05
S Jan 18 (018)
Notes:
* Ahead operating on second side lobe.
* Instrument telemetry dropouts may occur during the 5 hour station 43 support
for Ahead on Jan 18 due to extended playback of the SSR.
-------------------------------------------------------------------------------
Scheduled activities for Week 04:
M Jan 19 (019)
T Jan 20 (020)
W Jan 21 (021)
T Jan 22 (022)
F Jan 23 (023)
S Jan 24 (024)
S Jan 25 (025)
Notes:
* Ahead operating on second side lobe.
-------------------------------------------------------------------------------
Scheduled activities for Week 05:
M Jan 26 (026)
T Jan 27 (027)
W Jan 28 (028)
T Jan 29 (029) Solar Conjunction Readiness Review dry run.
F Jan 30 (030)
S Jan 31 (031)
S Feb 01 (032)
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 06:
M Feb 02 (033)
T Feb 03 (034)
W Feb 04 (035)
T Feb 05 (036)
F Feb 06 (037)
S Feb 07 (038)
S Feb 08 (039)
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 07:
M Feb 09 (040)
T Feb 10 (041) Ahead: Momentum dump, 15:30 UT
W Feb 11 (042)
T Feb 12 (043) Solar Conjunction Readiness Review
F Feb 13 (044)
S Feb 14 (045)
S Feb 15 (046)
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 08:
M Feb 16 (047)
T Feb 17 (048)
W Feb 18 (049)
T Feb 19 (050)
F Feb 20 (051)
S Feb 21 (052)
S Feb 22 (053)
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 09:
M Feb 23 (054)
T Feb 24 (055)
W Feb 25 (056)
T Feb 26 (057)
F Feb 27 (058)
S Feb 28 (059)
S Mar 01 (060)
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 10:
M Mar 02 (061)
T Mar 03 (062)
W Mar 04 (063)
T Mar 05 (064)
F Mar 06 (065)
S Mar 07 (066)
S Mar 08 (067) Start of daylight savings time in U.S.
Ahead: SECCHI reset at 00:00:20 UT
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 11:
M Mar 09 (068) Ahead: SECCHI recovery, 14:45 UT
T Mar 10 (069)
W Mar 11 (070)
T Mar 12 (071) Ahead: Uplink array test with stations 24 and 25.
F Mar 13 (072)
S Mar 14 (073)
S Mar 15 (074)
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 12:
M Mar 16 (075)
T Mar 17 (076) Ahead: Momentum dump, 23:00 UT
W Mar 18 (077)
T Mar 19 (078)
F Mar 20 (079) Ahead: Instrument power down (except SWAVES), 16:00 UT
S Mar 21 (080)
S Mar 22 (081)
Notes:
* Ahead operating on second side lobe.
* No passes for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 13:
M Mar 23 (082)
T Mar 24 (083) Ahead: Reset into solar conjunction mode, 16:00 UT
W Mar 25 (084)
T Mar 26 (085)
F Mar 27 (086) Ahead: Hard command loss timer fires at 16:20 UT
S Mar 28 (087)
S Mar 29 (088)
Notes:
* Ahead operating on second side lobe. No commanding after the reset on
Mar 24. The signal will continue to be monitored during the week, but the
signal margin may be too low to lock on.
* Attempts to reestablish communications with Behind start on Mar 23.
-------------------------------------------------------------------------------
Scheduled activities for Week 14:
M Mar 30 (089) Ahead: Hard command loss timer fires at 16:40 UT
T Mar 31 (090)
W Apr 01 (091)
T Apr 02 (092) Ahead: Hard command loss timer fires at 17:00 UT
F Apr 03 (093)
S Apr 04 (094)
S Apr 05 (095) Ahead: Hard command loss timer fires at 17:20 UT
Notes:
* Ahead in safe mode for superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 15:
M Apr 06 (096)
T Apr 07 (097)
W Apr 08 (098) Ahead: Hard command loss timer fires at 17:40 UT
T Apr 09 (099)
F Apr 10 (100)
S Apr 11 (101) Ahead: Hard command loss timer fires at 18:00 UT
S Apr 12 (102)
Notes:
* No tracks for either spacecraft due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 16:
M Apr 13 (103)
T Apr 14 (104) Ahead: Hard command loss timer fires at 18:19 UT
W Apr 15 (105)
T Apr 16 (106)
F Apr 17 (107) Ahead: Hard command loss timer fires at 18:39 UT
S Apr 18 (108)
S Apr 19 (109)
Notes:
* No tracks for either spacecraft due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 17:
M Apr 20 (110) Ahead: Hard command loss timer fires at 18:59 UT
T Apr 21 (111)
W Apr 22 (112)
T Apr 23 (113) Ahead: Hard command loss timer fires at 19:19 UT
F Apr 24 (114)
S Apr 25 (115)
S Apr 26 (116) Ahead: Hard command loss timer fires at 19:39 UT
Notes:
* No tracks for either spacecraft due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 18:
M Apr 27 (117)
T Apr 28 (118)
W Apr 29 (119) Ahead: Hard command loss timer fires at 19:59 UT
T Apr 30 (120)
F May 01 (121)
S May 02 (122) Ahead: Hard command loss timer fires at 20:19 UT
S May 03 (123)
Notes:
* No tracks for either spacecraft due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 19:
M May 04 (124) Behind: Resume Behind recovery efforts
T May 05 (125)
W May 06 (126)
T May 07 (127)
F May 08 (128)
S May 09 (129)
S May 10 (130)
Notes:
* No tracks for Ahead due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 20:
M May 11 (131)
T May 12 (132)
W May 13 (133)
T May 14 (134)
F May 15 (135)
S May 16 (136)
S May 17 (137)
Notes:
* No tracks for Ahead due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 21:
M May 18 (138)
T May 19 (139)
W May 20 (140)
T May 21 (141)
F May 22 (142)
S May 23 (143)
S May 24 (144)
Notes:
* No tracks for Ahead due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 22:
M May 25 (145)
T May 26 (146)
W May 27 (147)
T May 28 (148)
F May 29 (149)
S May 30 (150) Ahead: Greenbank Faraday rotation observations resume
S May 31 (151)
Notes:
* No tracks for Ahead due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 23:
M Jun 01 (152)
T Jun 02 (153)
W Jun 03 (154)
T Jun 04 (155)
F Jun 05 (156)
S Jun 06 (157)
S Jun 07 (158)
Notes:
* No tracks for Ahead due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 24:
M Jun 08 (159)
T Jun 09 (160)
W Jun 10 (161)
T Jun 11 (162)
F Jun 12 (163)
S Jun 13 (164)
S Jun 14 (165)
Notes:
* No tracks for Ahead due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 25:
M Jun 15 (166)
T Jun 16 (167)
W Jun 17 (168)
T Jun 18 (169)
F Jun 19 (170)
S Jun 20 (171)
S Jun 21 (172)
Notes:
* No tracks for Ahead due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 26:
M Jun 22 (173)
T Jun 23 (174)
W Jun 24 (175)
T Jun 25 (176)
F Jun 26 (177) Ahead: DSN monitoring resumes after 31st HCLT reset
S Jun 27 (178)
S Jun 28 (179) Behind: Suspend Behind recovery efforts
Notes:
* Ahead in safe mode for superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 27:
M Jun 29 (180) Ahead: 32nd hard command loss timer reset
T Jun 30 (181) Leap second at end of UTC day
W Jul 01 (182)
T Jul 02 (183) Ahead: 33rd hard command loss timer reset
F Jul 03 (184) Independence Day holiday
S Jul 04 (185)
S Jul 05 (186) Ahead: 34th hard command loss timer reset
Notes:
* Ahead in safe mode for superior solar conjunction.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 28:
M Jul 06 (187)
T Jul 07 (188) Ahead: 3-axis stabilized for several hours starting 0:00 UT
W Jul 08 (189) Ahead: 35th HCLT reset, followed by spacecraft recovery
T Jul 09 (190)
F Jul 10 (191) Ahead: Start of instrument recovery
S Jul 11 (192) Ahead: Start of SECCHI recovery
S Jul 12 (193)
Notes:
* Ahead operating on second side lobe starting Jul 8.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 29:
M Jul 13 (194)
T Jul 14 (195)
W Jul 15 (196)
T Jul 16 (197) Ahead: Wheel #3 power cycled, 16:45 UT
F Jul 17 (198)
S Jul 18 (199)
S Jul 19 (200)
Notes:
* Ahead operating on second side lobe.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 30:
M Jul 20 (201)
T Jul 21 (202)
W Jul 22 (203)
T Jul 23 (204) Ahead: Momentum dump, 21:00 UT
F Jul 24 (205)
S Jul 25 (206)
S Jul 26 (207) Ahead: Aphelion
Notes:
* Ahead operating on second side lobe.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 31:
M Jul 27 (208)
T Jul 28 (209)
W Jul 29 (210)
T Jul 30 (211)
F Jul 31 (212)
S Aug 01 (213)
S Aug 02 (214)
Notes:
* Ahead operating on second side lobe.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 32:
M Aug 03 (215)
T Aug 04 (216)
W Aug 05 (217)
T Aug 06 (218)
F Aug 07 (219)
S Aug 08 (220)
S Aug 09 (221)
Notes:
* Ahead operating on second side lobe.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 33:
M Aug 10 (222) Ahead: Project interface test with station 35
T Aug 11 (223)
W Aug 12 (224) Ahead: Return-to-service track with station 63
T Aug 13 (225)
F Aug 14 (226)
S Aug 15 (227)
S Aug 16 (228) Ahead: Switch to first side lobe.
Notes:
* Ahead operating on second side lobe.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 34:
M Aug 17 (229)
T Aug 18 (230)
W Aug 19 (231)
T Aug 20 (232)
F Aug 21 (233)
S Aug 22 (234)
S Aug 23 (235)
Notes:
* Ahead operating on the first side lobe, in IMPACT-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 35:
M Aug 24 (236) Ahead: Momentum dump, 18:00 UT
T Aug 25 (237)
W Aug 26 (238) Ahead: IMPACT SIT calibration table upload
T Aug 27 (239)
F Aug 28 (240)
S Aug 29 (241)
S Aug 30 (242)
Notes:
* Ahead operating on the first side lobe, in SWAVES-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 36:
M Aug 31 (243)
T Sep 01 (244)
W Sep 02 (245)
T Sep 03 (246)
F Sep 04 (247)
S Sep 05 (248)
S Sep 06 (249)
Notes:
* Ahead operating on the first side lobe, in IMPACT-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 37:
M Sep 07 (250) Labor Day
T Sep 08 (251)
W Sep 09 (252)
T Sep 10 (253)
F Sep 11 (254)
S Sep 12 (255)
S Sep 13 (256)
Notes:
* Ahead operating on the first side lobe, in SWAVES-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 38:
M Sep 14 (257)
T Sep 15 (258)
W Sep 16 (259)
T Sep 17 (260)
F Sep 18 (261)
S Sep 19 (262)
S Sep 20 (263)
Notes:
* Ahead operating on the first side lobe, in IMPACT-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 39:
M Sep 21 (264)
T Sep 22 (265)
W Sep 23 (266)
T Sep 24 (267)
F Sep 25 (268)
S Sep 26 (269)
S Sep 27 (270)
Notes:
* Ahead operating on the first side lobe, in SWAVES-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 40:
M Sep 28 (271) Ahead: Test with 80 kW transmitter on station 26
T Sep 29 (272) Ahead: Test of frequence acquisition mode with station 43
W Sep 30 (273) Ahead: Momentum dump, 22:30 UT
T Oct 01 (274) Beginning of 3rd extended STEREO mission.
F Oct 02 (275)
S Oct 03 (276)
S Oct 04 (277)
Notes:
* Ahead operating on the first side lobe, in IMPACT-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 41:
M Oct 05 (278)
T Oct 06 (279)
W Oct 07 (280)
T Oct 08 (281) Ahead: Uplink array test with stations 24 & 25.
F Oct 09 (282)
S Oct 10 (283)
S Oct 11 (284)
Notes:
* Ahead operating on the first side lobe, in SWAVES-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 42:
M Oct 12 (285)
T Oct 13 (286)
W Oct 14 (287)
T Oct 15 (288)
F Oct 16 (289)
S Oct 17 (290)
S Oct 18 (291)
Notes:
* Ahead operating on the first side lobe, in IMPACT-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 43:
M Oct 19 (292)
T Oct 20 (293)
W Oct 21 (294)
T Oct 22 (295)
F Oct 23 (296)
S Oct 24 (297)
S Oct 25 (298) 9th STEREO launch anniversary
Notes:
* Ahead operating on the first side lobe, in SWAVES-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 44:
M Oct 26 (299)
T Oct 27 (300)
W Oct 28 (301)
T Oct 29 (302)
F Oct 30 (303)
S Oct 31 (304)
S Nov 01 (305) Daylight savings time ends in U.S.
Notes:
* Ahead operating on the first side lobe, in IMPACT-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 45:
M Nov 02 (306) Ahead: Momentum dump, 17:30 UT
T Nov 03 (307)
W Nov 04 (308)
T Nov 05 (309)
F Nov 06 (310)
S Nov 07 (311)
S Nov 08 (312)
Notes:
* Ahead operating on the first side lobe, in SWAVES-prime mode.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 46:
M Nov 09 (313) Ahead: Space weather beacon on NOAA stations resumes 21:55 UT
T Nov 10 (314) Ahead: HGA on main lobe, offpoint 1 degree, 240 kbps
Ahead: 30 kbps on 34 meter stations
W Nov 11 (315)
T Nov 12 (316)
F Nov 13 (317)
S Nov 14 (318)
S Nov 15 (319) Ahead: No space weather broadcast following station 43 pass
Notes:
* Ahead starts the week on the first side lobe, in IMPACT-prime mode. The
instruments will continue to produce telemetry at the first-side-lobe rates
through the week, until the SSR partitions are reconfigured on Monday,
Nov 16.
* SECCHI will stop taking images near the end of the day on Nov 15 to assist in
the SSR reconfigurations. Images will resume sometime on Nov 16 or 17.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 47:
M Nov 16 (320) Ahead: SSR playback and reconfiguration
Ahead: No SECCHI telemetry 10:00-10:20 UT
Ahead: Resume prime science real-time telemetry rates
Ahead: End S/C telemetry in space weather broadcast
T Nov 17 (321) Ahead: Instrument recommissioning, IMPACT SWEA/STE on
W Nov 18 (322)
T Nov 19 (323) Ahead: HGA on main lobe, riding soft stop, 360 kbps on 70 m
Ahead: Uplink array test (DSS-25 & 26)
F Nov 20 (324)
S Nov 21 (325) Ahead: Return-to-service test with station 55
S Nov 22 (326)
Notes:
* After Friday, Nov 20, the Behind spacecraft will be able to operate on the
first side lobe after it is recovered.
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 48:
M Nov 23 (327) Ahead: 96 kbps on 34 meter stations
T Nov 24 (328)
W Nov 25 (329)
T Nov 26 (330) Thanksgiving
F Nov 27 (331)
S Nov 28 (332)
S Nov 29 (333)
Notes:
* No tracks for Behind due to superior solar conjunction.
-------------------------------------------------------------------------------
Scheduled activities for Week 49:
M Nov 30 (334) Ahead: HGA on main lobe, riding soft stop, 480 kbps
Ahead: 120 kbps on 34 meter stations
Behind: Resume Behind recovery efforts
T Dec 01 (335)
W Dec 02 (336) Ahead: Begin No Gyro Operations (NGO)
Ahead: First NGO momentum dump, 23:00 UT
T Dec 03 (337)
F Dec 04 (338)
S Dec 05 (339)
S Dec 06 (340)
-------------------------------------------------------------------------------
Scheduled activities for Week 50:
M Dec 07 (341)
T Dec 08 (342)
W Dec 09 (343)
T Dec 10 (344)
F Dec 11 (345) Ahead: Return-to-service track with station 34.
S Dec 12 (346)
S Dec 13 (347)
-------------------------------------------------------------------------------
Scheduled activities for Week 51:
M Dec 14 (348) Ahead: 160 kbps on 34 meter stations
T Dec 15 (349)
W Dec 16 (350)
T Dec 17 (351)
F Dec 18 (352)
S Dec 19 (353)
S Dec 20 (354)
Notes:
* Large data loss between Dec 15-17 due to unexpected DSS-63 downtime
-------------------------------------------------------------------------------
Scheduled activities for Week 52:
M Dec 21 (355) Ahead: Momentum dump, 20:00 UT
T Dec 22 (356)
W Dec 23 (357)
T Dec 24 (358) Ahead: No SECCHI images
F Dec 25 (359) Christmas
S Dec 26 (360)
S Dec 27 (361)
-------------------------------------------------------------------------------
Scheduled activities for Week 53:
M Dec 28 (362) Ahead: Main lobe, riding soft stop, 720 kbps (70 m)
T Dec 29 (363)
W Dec 30 (364) Ahead: HGA on main lobe
T Dec 31 (365)
F Jan 01 (001) New Year
S Jan 02 (002)
S Jan 03 (003) Ahead: No SECCHI data due to onboard software problem
-------------------------------------------------------------------------------
Plans last modified Tuesday, 05-Jan-2016 19:58:42 UTC
Last Revised: Wednesday, 28-Sep-2016 16:14:34 UTC
Responsible NASA Official: ![[email address: Therese.A.Kucera<at>nasa<dot>gov]](/img/kucera_email1.jpg)
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