SPIRE Spectrometer Daily Dark Sky Observations

Observations of an area of dark sky are made with the SPIRE Spectrometer for every day it is operating. The number of repetitions in these observations is set to match the longest science observation on that day, although sometimes when two consecutive SPIRE days are observed, the long dark sky observation may be on the day before or after the science observation. The location of the dark sky field is 17h40m12.00s, 69d00'00.00''.

The following table shows the dark sky observations that have been made in the normal observing mode (not the bright source mode). The mean instrument temperature is given for the dark sky observation. The final columns show the range of telescope temperatures over the entire day for the primary (M1) and secondary (M2) mirrors. The telescope temperatures for each day are also detailed on the Spacecraft and Observatory page - the variation in primary mirror temperature through the mission (taken from that page) is shown below.

These observations are all publically available in the Herschel Science Archive.

OD Num	Date	Start Time	End Time	OBSID	Num Reps	Res	Instrument (SCAL) Temp	Telescope M1 Temp (min-max)	Telescope M2 Temp (min-max)
423	11-07-2010	00:48:06	01:41:09	1342200178 (0x50005972)	16	C	4.408	87.919 - 87.943	84.086 - 84.095
438	26-07-2010	00:30:10	00:50:36	1342201203 (0x50005D73)	4	C	4.540	88.024 - 88.026	84.085 - 84.091
209	09-12-2009	01:57:24	04:24:44	1342187890 (0x50002972)	50	C	4.426	87.886 - 87.894	84.158 - 84.161
997	05-02-2012	01:59:49	06:30:49	1342238702 (0x5000EFEE)	100	C	4.835	89.426 - 89.431	85.040 - 85.047
189	19-11-2009	02:26:30	04:39:49	1342187086 (0x5000264E)	50	H	4.438	87.813 - 87.817	84.110 - 84.112
368	17-05-2010	02:48:59	03:33:43	1342196611 (0x50004B83)	16	C	4.728	88.442 - 88.446	84.502 - 84.504
423	11-07-2010	02:23:20	03:07:57	1342200184 (0x50005978)	16	C	4.433	87.919 - 87.943	84.086 - 84.095
625	29-01-2011	02:16:59	06:54:20	1342213378 (0x50008D02)	105	C	4.739	89.420 - 89.421	85.192 - 85.199
1165	22-07-2012	02:55:46	07:51:24	1342248413 (0x500115DD)	125	H	4.767	88.500 - 88.504	84.207 - 84.211
495	21-09-2010	03:35:30	04:12:40	1342204934 (0x50006C06)	10	C	4.606	88.790 - 88.824	84.786 - 84.809
654	27-02-2011	03:18:15	07:47:52	1342214832 (0x500092B0)	100	C	4.591	89.111 - 89.117	84.961 - 84.966
971	10-01-2012	03:52:21	07:11:18	1342236999 (0x5000E947)	75	C	4.701	89.641 - 89.642	85.233 - 85.239
1011	19-02-2012	03:39:17	07:00:18	1342239348 (0x5000F274)	75	C	4.684	89.644 - 89.651	85.230 - 85.235
466	23-08-2010	04:51:17	06:43:22	1342204035 (0x50006883)	40	C	4.650	88.504 - 88.507	84.484 - 84.489
601	05-01-2011	04:51:31	09:41:08	1342212320 (0x500088E0)	110	C	4.700	89.351 - 89.356	85.155 - 85.160
824	16-08-2011	04:28:34	06:53:42	1342227459 (0x5000C403)	45	C	4.789	88.423 - 88.443	84.339 - 84.349
571	06-12-2010	05:25:36	09:56:17	1342210850 (0x50008322)	100	C	4.694	89.000 - 89.010	84.927 - 84.932
572	07-12-2010	05:28:32	06:03:58	1342210863 (0x5000832F)	5	C	4.719	89.022 - 89.032	84.908 - 84.915
683	28-03-2011	06:21:30	06:49:06	1342216912 (0x50009AD0)	5	C	4.802	89.010 - 89.021	84.810 - 84.830
1186	12-08-2012	06:01:56	06:20:41	1342249453 (0x500119ED)	5	L	4.509	88.842 - 88.847	84.513 - 84.517
1186	12-08-2012	06:20:47	12:03:00	1342249454 (0x500119EE)	150	H	4.573	88.842 - 88.847	84.513 - 84.517
971	10-01-2012	07:26:02	08:06:07	1342237001 (0x5000E949)	16	H	4.722	89.641 - 89.642	85.233 - 85.239
1032	11-03-2012	07:31:03	11:23:03	1342242595 (0x5000FF23)	100	H	4.512	89.211 - 89.214	84.892 - 84.896
1130	17-06-2012	07:22:05	07:35:00	1342247108 (0x500110C4)	10	L	4.774	88.413 - 88.416	84.163 - 84.165
1130	17-06-2012	07:35:06	11:24:36	1342247109 (0x500110C5)	100	H	4.816	88.413 - 88.416	84.163 - 84.165
803	26-07-2011	08:38:45	12:20:19	1342224758 (0x5000B976)	80	C	4.709	88.174 - 88.180	84.072 - 84.076
836	28-08-2011	08:07:24	12:38:16	1342227521 (0x5000C441)	100	C	4.727	88.782 - 88.788	84.584 - 84.586
837	29-08-2011	08:49:31	09:30:56	1342227790 (0x5000C54E)	16	H	4.740	88.773 - 88.804	84.586 - 84.595
971	10-01-2012	08:23:39	08:31:35	1342237003 (0x5000E94B)	16	L	4.693	89.641 - 89.642	85.233 - 85.239
971	10-01-2012	08:31:41	09:16:18	1342237004 (0x5000E94C)	16	C	4.748	89.641 - 89.642	85.233 - 85.239
972	11-01-2012	08:13:10	08:31:04	1342237029 (0x5000E965)	5	C	4.760	89.648 - 89.652	85.254 - 85.264
1012	20-02-2012	08:30:40	08:56:17	1342239359 (0x5000F27F)	5	C	4.720	89.555 - 89.564	85.202 - 85.222
1150	07-07-2012	08:53:19	09:09:10	1342247752 (0x50011348)	10	L	4.719	88.368 - 88.381	84.125 - 84.129
1177	03-08-2012	08:56:45	09:16:52	1342249067 (0x5001186B)	30	L	4.739	88.678 - 88.692	84.389 - 84.392
288	26-02-2010	09:42:11	10:38:58	1342191216 (0x50003670)	16	C	4.820	88.718 - 88.736	84.808 - 84.812
602	06-01-2011	09:26:22	09:51:15	1342212348 (0x500088FC)	5	C	4.663	89.402 - 89.414	85.196 - 85.212
655	28-02-2011	09:44:55	10:13:00	1342214859 (0x500092CB)	5	C	4.640	89.173 - 89.198	84.968 - 84.989
767	20-06-2011	09:58:51	10:22:29	1342222873 (0x5000B219)	5	C	4.662	88.146 - 88.161	84.128 - 84.135
837	29-08-2011	09:48:28	09:56:24	1342227792 (0x5000C550)	16	L	4.700	88.773 - 88.804	84.586 - 84.595
998	06-02-2012	09:19:21	09:41:34	1342238713 (0x5000EFF9)	5	C	4.827	89.485 - 89.503	85.078 - 85.105
1150	07-07-2012	09:09:16	12:58:46	1342247753 (0x50011349)	100	H	4.755	88.368 - 88.381	84.125 - 84.129
1177	03-08-2012	09:16:58	13:06:28	1342249068 (0x5001186C)	100	H	4.806	88.678 - 88.692	84.389 - 84.392
261	30-01-2010	10:58:14	13:10:24	1342189892 (0x50003144)	50	C	4.902	88.745 - 88.774	84.846 - 84.857
302	12-03-2010	10:54:29	11:13:35	1342192189 (0x50003A3D)	6	C	4.859	88.756 - 88.761	84.831 - 84.833
451	08-08-2010	10:36:37	10:54:01	1342202267 (0x5000619B)	4	C	4.783	88.422 - 88.453	84.457 - 84.466
557	22-11-2010	10:31:46	15:20:44	1342209858 (0x50007F42)	110	C	4.800	89.079 - 89.083	84.969 - 84.970
885	16-10-2011	10:49:00	14:02:16	1342231052 (0x5000D20C)	70	C	4.762	89.123 - 89.131	84.835 - 84.838
907	07-11-2011	10:43:10	15:02:26	1342231982 (0x5000D5AE)	100	C	4.650	89.133 - 89.138	84.866 - 84.868
1160	17-07-2012	10:54:21	11:25:41	1342248234 (0x5001152A)	30	L	4.651	88.565 - 88.571	84.262 - 84.265
1207	02-09-2012	10:51:06	11:40:35	1342250517 (0x50011E15)	150	L	4.722	89.027 - 89.030	84.627 - 84.633
240	09-01-2010	11:33:59	13:20:35	1342189120 (0x50002E40)	40	C	4.897	88.281 - 88.313	84.486 - 84.493
250	19-01-2010	11:27:12	13:39:21	1342189541 (0x50002FE5)	50	C	5.099	88.582 - 88.589	84.687 - 84.705
410	28-06-2010	11:51:53	12:50:32	1342199255 (0x500055D7)	16	C	4.694	88.074 - 88.077	84.160 - 84.162
856	17-09-2011	11:03:26	13:46:47	1342228707 (0x5000C8E3)	60	C	4.812	89.044 - 89.051	84.800 - 84.803
857	18-09-2011	11:46:47	12:09:29	1342228746 (0x5000C90A)	5	C	4.812	88.968 - 88.986	84.767 - 84.786
1032	11-03-2012	11:23:09	15:42:30	1342242596 (0x5000FF24)	100	C	4.524	89.211 - 89.214	84.892 - 84.896
1098	16-05-2012	11:30:51	11:47:27	1342245852 (0x50010BDC)	20	L	4.601	88.929 - 88.932	84.586 - 84.588
1098	16-05-2012	11:47:33	15:37:03	1342245853 (0x50010BDD)	100	H	4.650	88.929 - 88.932	84.586 - 84.588
1111	29-05-2012	11:19:52	11:40:55	1342246260 (0x50010D74)	5	L	4.637	88.954 - 88.964	84.609 - 84.611
1111	29-05-2012	11:41:01	15:30:31	1342246261 (0x50010D75)	100	H	4.700	88.954 - 88.964	84.609 - 84.611
1125	12-06-2012	11:32:29	11:45:47	1342246983 (0x50011047)	10	L	4.606	88.587 - 88.595	84.309 - 84.312
1125	12-06-2012	11:45:53	15:46:39	1342246984 (0x50011048)	105	H	4.672	88.587 - 88.595	84.309 - 84.312
1151	08-07-2012	11:37:59	12:07:17	1342247768 (0x50011358)	5	H	4.773	88.299 - 88.304	84.071 - 84.084
1160	17-07-2012	11:25:47	15:15:17	1342248235 (0x5001152B)	100	H	4.693	88.565 - 88.571	84.262 - 84.265
1207	02-09-2012	11:40:41	15:52:45	1342250518 (0x50011E16)	110	H	4.806	89.027 - 89.030	84.627 - 84.633
428	16-07-2010	12:35:36	13:03:07	1342201496 (0x50005E98)	4	C	4.770	87.921 - 87.933	84.026 - 84.036
804	27-07-2011	12:18:37	12:39:10	1342224770 (0x5000B982)	5	C	4.804	88.218 - 88.225	84.099 - 84.111
1144	01-07-2012	12:43:38	13:06:20	1342247574 (0x50011296)	40	L	4.753	88.474 - 88.479	84.193 - 84.198
217	17-12-2009	13:14:36	15:26:58	1342188195 (0x50002AA3)	50	C	4.917	88.022 - 88.034	84.248 - 84.260
227	27-12-2009	13:07:28	14:54:04	1342188673 (0x50002C81)	40	C	5.016	88.170 - 88.176	84.367 - 84.376
327	06-04-2010	13:16:21	14:00:59	1342193682 (0x50004012)	16	C	4.714	88.230 - 88.239	84.334 - 84.345
395	13-06-2010	13:15:33	14:00:11	1342198277 (0x50005205)	16	C	4.920	88.243 - 88.264	84.316 - 84.326
404	22-06-2010	13:06:04	13:50:41	1342198928 (0x50005490)	16	C	4.606	88.185 - 88.196	84.280 - 84.282
682	27-03-2011	13:09:23	14:54:14	1342216889 (0x50009AB9)	35	C	4.816	88.984 - 88.987	84.768 - 84.775
886	17-10-2011	13:03:36	13:33:32	1342231086 (0x5000D22E)	5	C	4.797	89.095 - 89.114	84.850 - 84.854
908	08-11-2011	13:51:19	14:10:32	1342231995 (0x5000D5BB)	5	C	4.687	89.194 - 89.239	84.883 - 84.914
1144	01-07-2012	13:06:26	15:14:29	1342247575 (0x50011297)	55	H	4.810	88.474 - 88.479	84.193 - 84.198
1178	04-08-2012	13:26:05	13:51:56	1342249056 (0x50011860)	5	H	4.813	88.564 - 88.568	84.308 - 84.335
1187	13-08-2012	13:14:05	13:29:22	1342249484 (0x50011A0C)	5	H	4.761	88.870 - 88.890	84.521 - 84.530
261	30-01-2010	14:26:17	14:33:57	1342189895 (0x50003147)	12	L	4.852	88.745 - 88.774	84.846 - 84.857
342	21-04-2010	14:56:27	15:41:15	1342195329 (0x50004681)	16	C	5.093	88.167 - 88.179	84.253 - 84.274
543	08-11-2010	14:00:51	14:55:54	1342208391 (0x50007987)	20	C	4.773	88.650 - 88.656	84.614 - 84.616
710	24-04-2011	14:22:09	18:47:01	1342219556 (0x5000A524)	100	C	4.716	88.582 - 88.587	84.420 - 84.428
1161	18-07-2012	14:28:02	14:43:23	1342248253 (0x5001153D)	5	H	4.754	88.603 - 88.617	84.278 - 84.300
275	13-02-2010	15:56:45	16:50:02	1342190675 (0x50003453)	16	C	4.750	88.688 - 88.697	84.775 - 84.784
354	03-05-2010	15:59:16	16:43:56	1342195764 (0x50004834)	16	C	4.926	88.376 - 88.446	84.505 - 84.529
1033	12-03-2012	15:47:17	16:03:49	1342242626 (0x5000FF42)	5	C	4.676	89.218 - 89.236	84.874 - 84.881
1079	27-04-2012	15:08:53	15:22:32	1342245124 (0x50010904)	20	L	4.595	88.865 - 88.870	84.518 - 84.525
1079	27-04-2012	15:22:38	17:30:40	1342245125 (0x50010905)	55	H	4.655	88.865 - 88.870	84.518 - 84.525
1126	13-06-2012	15:45:45	16:06:56	1342246995 (0x50011053)	5	H	4.724	88.550 - 88.565	84.289 - 84.301
1131	18-06-2012	15:08:21	15:31:14	1342247124 (0x500110D4)	5	H	4.773	88.470 - 88.482	84.167 - 84.192
1145	02-07-2012	15:01:39	15:20:22	1342247626 (0x500112CA)	5	H	4.786	88.512 - 88.538	84.226 - 84.234
1053	01-04-2012	16:52:04	17:39:30	1342243619 (0x50010323)	150	L	4.770	88.776 - 88.784	84.526 - 84.534
1112	30-05-2012	16:22:49	16:46:21	1342246289 (0x50010D91)	5	H	4.742	88.837 - 88.850	84.555 - 84.581
1208	03-09-2012	16:05:34	16:35:42	1342250558 (0x50011E3E)	5	H	4.864	89.046 - 89.052	84.656 - 84.665
1053	01-04-2012	17:39:36	20:42:15	1342243620 (0x50010324)	70	C	4.844	88.776 - 88.784	84.526 - 84.534
317	27-03-2010	18:56:06	19:52:25	1342192838 (0x50003CC6)	16	C	4.730	88.424 - 88.448	84.579 - 84.591
1024	02-03-2012	18:54:30	19:34:47	1342240017 (0x5000F511)	10	C	4.852	89.481 - 89.485	85.099 - 85.100
1080	28-04-2012	18:43:21	19:12:43	1342245097 (0x500108E9)	5	H	4.699	88.869 - 88.889	84.561 - 84.564
1099	17-05-2012	18:27:12	18:48:34	1342245873 (0x50010BF1)	5	H	4.760	88.900 - 88.940	84.598 - 84.605
383	31-05-2010	19:05:57	21:20:32	1342197456 (0x50004ED0)	50	C	4.837	88.184 - 88.195	84.284 - 84.289
626	29-01-2011	19:51:06	20:23:25	1342213446 (0x50008D46)	5	C	4.766	89.438 - 89.448	85.216 - 85.228
741	25-05-2011	19:03:29	20:15:35	1342221688 (0x5000AD78)	25	C	4.577	88.524 - 88.710	80.197 - 84.351
879	09-10-2011	20:38:12	23:10:55	1342230416 (0x5000CF90)	55	C	4.881	88.973 - 88.980	84.735 - 84.737
1054	02-04-2012	20:08:16	20:30:03	1342243642 (0x5001033A)	5	C	4.797	88.776 - 88.802	84.488 - 84.499
742	26-05-2011	21:57:31	22:15:26	1342221717 (0x5000AD95)	5	C	4.608	88.559 - 88.590	84.401 - 84.425
988	26-01-2012	21:34:19	04:34:46	1342238243 (0x5000EE23)	160	C	4.736	89.481 - 89.485	85.167 - 85.174
711	25-04-2011	22:36:26	22:58:20	1342219576 (0x5000A538)	5	C	4.740	88.638 - 88.640	84.468 - 84.490