International Laser Ranging Service

SLR Monthly Global Performance Report Card

September 1, 2024 through August 31, 2025

The performance report card is divided into three tables for readability. Table 1 contains performance parameters based on data volume, on-site processing statistics and operational compliance issues. Tables L1 and L2 contain information about Lunar Laser Ranging during the past year. Table 2 contains performance parameters based on various Analysis Centers' rapid orbital analysis results.

A blank in any column in any of the tables implies either that there was no data or that there was insufficient data.

Below are the detailed descriptions of each column in Table 1 plots of the columns are linked in this description and in Table 1:

• Column 1 is the station location name.
• Column 2 is the monument marker number.
• Column 3 is the LEO pass total during the past 12 months.
• Column 4 is the LAGEOS and LARES pass total during the past 12 months. Performance charts starting in 2025 include LARES-2.
• Column 5 is the high satellite pass total during the past 12 months.
• Column 6 is the pass total (i.e., all satellites) during the past 12 months.
• Column 7 is the LEO NP total during the past 12 months.
• Column 8 is the LAGEOS and LARES NP total during the past 12 months. Performance charts starting in 2025 include LARES-2.
• Column 9 is the high satellite NP total during the past 12 months.
• Column 10 is the NP total (i.e., all satellites) during the past 12 months.
• Column 11 is the total tracking minutes (i.e., all satellites) during the past 12 months. This is computed by the summation of the number of normal points multiplied by its bin size in minutes.
• Column 12 is the average single-shot calibration RMS, in millimeters, during the last quarter.
• Column 13 is the average single-shot Starlette RMS, in millimeters, during the last quarter.
• Column 14 is the average single-shot LAGEOS RMS, in millimeters, during the last quarter.

The first entry in each table is for the performance baseline goal. Note: There are no baseline goals for NP data quantities, single shot RMSs.

Additional Notes: Only stations that have supplied data within the last year are included in the table. The table is sorted in descending order by total passes.

Table 1: Station performance parameters based on data volume, on-site processing statistics and operational compliance issues

Site Information		Data Volume									Data Quality
Column 1	2	3	4	5	6	7	8	9	10	11	12	13	14
Station Location	Station Number	LEO pass Tot	LAGEOS and LARES pass Tot	High pass Tot	Total passes	LEO NP Total	LAGEOS and LARES NP Total	High NP Total	Total NP	Minutes of Data	Cal. RMS	Star RMS	LAG RMS
Baseline		2300	600	3000	3500
Yarragadee	7090	16882	3339	4092	24313	243987	33750	15007	292744	193327	5.1	6.2	6.9
Changchun	7237	7913	1747	5120	14780	86598	8403	18465	113466	127940	4.9	3.9	4.0
Wettzell	8834	5226	1692	3105	10023	104407	19524	11712	135643	120964	3.0	8.3	9.7
Herstmonceux	7840	5315	1502	2999	9816	67081	16709	9315	93105	91565	3.0	8.9	12.2
Graz	7839	4665	1293	3651	9609	72768	10993	11815	95576	96937	2.4	3.9	5.1
Potsdam_3	7841	4952	1333	1566	7851	59690	9389	5582	74661	56918	2.0	8.3	11.5
Kunming	7819	2564	739	4512	7815	28355	3258	8977	40590	57463	5.2	11.6	11.6
Matera_MLRO	7941	3727	1900	1021	6648	33246	18333	7254	58833	80695	1.1	3.2	4.3
Mount_Stromlo_2	7825	3239	1942	1203	6384	24578	18007	6835	49420	76340	3.4	5.1	8.8
Greenbelt	7105	4661	711	500	5872	82288	7268	2160	91716	41671	5.5	8.7	9.2
Shanghai_2	7821	2386	801	2350	5537	19589	7971	10286	37846	72417	2.5	5.5	5.1
Wettzell_SOSW	7827	2485	911	1425	4821	20212	6229	3230	29671	31255	7.7	10.6	10.9
Badary	1890	3618	913	53	4584	25913	4245	139	30297	15481		10.7	13.7
Zimmerwald_532	7810	2920	748	521	4189	32056	9131	1800	42987	33639	3.7	8.8	13.3
Beijing	7249	1590	465	1931	3986	12757	1960	3888	18605	26331	6.5	9.4	9.0
Simosato	7838	3185	621	6	3812	36197	5148	25	41370	18476	5.6	7.4	16.1
Monument_Peak	7110	3009	514	140	3663	46093	5211	1177	52481	25171	3.0	5.6	6.5
Wuhan	7396	1753	540	1225	3518	17628	4308	6342	28278	44579	4.7	7.2	6.7
Grasse_MEO	7845	805	795	1551	3151	8955	9056	5664	23675	49744	10.4	15.0	15.9
Haleakala	7119	2196	690	0	2886	36751	7433	0	44184	22316	2.3	5.7	6.7
Yebes	7817	1924	605	296	2825	26384	5326	1703	33413	24316	7.1	8.0	5.5
Riga	1884	1288	547	293	2128	13697	4468	1393	19558	17400	7.0	13.8	17.1
Svetloe	1888	1515	468	1	1984	11701	3421	4	15126	9349		11.0	15.7
Irkutsk	1891	1489	489	5	1983	10605	2197	9	12811	7363	37.1	25.5	32.5
Tenerife	7701	765	429	651	1845	8754	2744	2416	13914	19178	5.5	10.9	6.0
Tahiti	7124	1471	270	18	1759	16512	1894	61	18467	8183	3.0	7.1	7.3
Kiev	1824	1334	359	0	1693	12591	2493	0	15084	7581	9.4	17.2	18.5
Tsukuba	7306	684	298	683	1665	9129	1870	1907	12906	15035	6.4	10.3	6.5
Katzively	1893	1322	220	1	1543	15752	1593	4	17349	7156	26.5	34.7	24.8
Arequipa	7403	1335	110	0	1445	10332	465	0	10797	4362	3.5	6.7	7.5
Zelenchukskaya	1889	1097	321	0	1418	10866	2161	0	13027	7947		35.4	29.4
Borowiec	7811	881	224	17	1122	11781	2327	62	14170	7802	15.1	20.5	18.7
Simeiz	1873	938	135	6	1079	7798	971	19	8788	3864	29.3	16.1	14.9
Hartebeesthoek_HARL	7501	317	29	0	346	4018	251	0	4269	1603	5.5	10.2	9.9
Mendeleevo	1874	73	106	21	200	1202	1372	93	2667	3422	34.4	26.2	18.7
Apache_Point	7045	7	0	0	7	19	0	0	19	81	18.1
Hartebeesthoek_HRTL	7503	10	0	0	10	46	0	0	46	23	28.2

Below are the detailed descriptions of each column in Tables L1 and L2:

• the first column, L1, is the station location name.
• the second column, L2, is the monument marker number.
• the third column, L3, is the wavelength.
• the fourth column, L4, is the number of passes during the past 12 months.
• the fifth column, L5, is the number of Lunar Laser Ranging normal points during the past 12 months
• the sixth, ninth, twelfth, fifteenth, and eighteenth columns, L6, L9, L12, L15, L18, are the number of passes taken, specific to a retroreflector, during the past 12 months in which there were Lunar ranging measurements.
• the seventh, tenth, thirteenth, sixteenth, and nineteenth columns, L7, L10, L13, L16, L19 are the number of normal points taken, specific to a retroreflector, during the past 12 months
• the eighth, eleventh, fourteenth, seventeenth, and twentieth columns, L8, L11, L14, L17, L20 are the average Lunar Laser Ranging normal points rms 12 months in mm for a specific retroreflector

Table L1: Lunar Laser Ranging information during the past year

Last 12 months			All reflectors		Apollo-11			Apollo-14			Apollo-15			Luna-17			Luna-21
Column L1	L2	L3	L4	L5	L6	L7	L8	L9	L10	L11	L12	L13	L14	L15	L16	L17	L18	L19	L20
Station Location	Station number	λ	Passes	NPTs	Passes	NPTs	RMS	Passes	NPTs	RMS	Passes	NPTs	RMS	Passes	NPTs	RMS	Passes	NPTs	RMS
Apache Point	7045	532.0	22	153	15	20	24.87	15	18	21.34	22	92	32.22	11	12	20.28	8	11	21.29
Grasse_MEO	7845	1064.0	20	184	11	31	27.55	11	21	25.83	20	75	34.32	13	30	25.11	12	27	30.82
Grasse_MEO	7845	532.0	1	3							1	2	44.20	1	1	34.50
Matera_MLRO	7941	532.0	2	6							2	6	52.35
Wettzell	8834	1064.0	10	145							4	69	26.47	1	1	45.30	7	75	25.34

Table L2: Lunar Laser Ranging information during the past 3 months

Last 3 months

All reflectors

Apollo-11

Apollo-14

Apollo-15

Luna-17

Luna-21

Column L1

L2

L3

L4

L5

L6

L7

L8

L9

L10

L11

L12

L13

L14

L15

L16

L17

L18

L19

L20

Station Location

Station number

λ

Passes

NPTs

Passes

NPTs

RMS

Passes

NPTs

RMS

Passes

NPTs

RMS

Passes

NPTs

RMS

Passes

NPTs

RMS

Matera_MLRO

7941

532.0

1

1

1

1

59.30

Wettzell

8834

1064.0

1

1

1

1

45.30

Below are the detailed descriptions of each column in Table 2:

• the first column is the station location name.
• the second column is the monument marker number.
• following columns are in grouped by analysis center with four columns for each
  • the first AC column is the average LAGEOS normal point RMS, in millimeters, during the last 3 months
  • the second AC column is the measure of short term bias stability, in millimeters, during the last 3 months. The short term stability is computed as the standard deviation about the mean of the pass-by-pass range biases (minimum number of passes in the last 3 months is 10)
  • the third AC column is the measure of long term bias stability, in millimeters, during the past year. The long term stability is the standard deviation of the monthly range bias estimates. A station must have tracked LAGEOS (1,2) in at least 8 of the last 12 months in order to compute this metric.
  • the fourth AC column is the percentage of LAGEOS normal points that were accepted in the analysis.

The first entry in each table is for the performance baseline goal.

Additional Notes: Only stations that have supplied data within the last year are included in the table. The table is sorted in descending order by total data volume.

Table 2: Performance parameters based on various Analysis Centers' rapid orbital analysis results.

Site Information		DGFI Orbital Analysis				Hitotsubashi Univ. Orbital Analysis				JCET Orbital Analysis				MCC Orbital Analysis				SHAO Orbital Analysis
Station Location	Station Number	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP	LAG NP RMS (mm)	short term (mm)	long term (mm)	% good LAG. NP
Baseline		10.0	20.0	10.0	95	10.0	20.0	10.0	95	10.0	20.0	10.0	95	10.0	20.0	10.0	95	10.0	20.0	10.0	95
Kiev	1824					7.5	33.7	13.0	99	5.0	23.7	13.0	75
Simeiz	1873					1.0		44.7	97
Mendeleevo	1874					3.1	11.8	5.2	100	3.6	14.4	5.3	97
Riga	1884					3.1	5.5	15.6	100	3.3	9.1	19.3	97
Svetloe	1888					2.4	6.0	4.8	100	2.3	8.9	4.3	99
Zelenchukskaya	1889					8.0	11.5	3.7	100	4.4	11.8	4.7	91
Badary	1890					2.0	6.8	3.0	100	2.2	9.6	4.5	100
Irkutsk	1891					2.8	7.8	4.3	100	3.1	7.9	6.2	97
Katzively	1893					9.6	14.8	6.6	98	5.8
Yarragadee	7090					1.5	4.7	0.6	100	2.2	9.6	0.9	99
Greenbelt	7105					2.2	4.5	1.2	100	2.5	8.5	4.3	99
Monument_Peak	7110					1.6	4.9	2.6	100	2.2	7.8	3.7	100
Haleakala	7119					1.5	5.8	2.6	100	2.2	8.6	5.2	99
Tahiti	7124					1.9	4.3	2.2	100	2.5	7.3	6.4	99
Changchun	7237					1.3	8.7	3.1	100	1.7	11.4	3.9	100
Beijing	7249					1.9	24.6	10.4	100	2.6	22.2	10.1	98
Tsukuba	7306					0.9	16.9	11.3	100	2.0	17.3	12.4	94
Ishioka	7317					12.0
Wuhan	7396					1.2	10.2	6.5	100	2.1	11.0	8.6	99
Hartebeesthoek_HARL	7501					2.4	6.7			3.4	6.6
Tenerife	7701					1.3	15.7	4.3	100	2.0	9.4	2.9	100
Zimmerwald_532	7810					2.0	14.2	5.8	99	2.2	6.9	7.7	95
Borowiec	7811					2.0		11.7	100	1.9		13.7	96
Yebes	7817					0.9	11.7			1.3	8.7	3.7	100
Kunming	7819					3.9	16.4	4.1	100	3.8	15.7	3.8	95
Shanghai_2	7821					1.1	6.0	1.9	100	1.6	7.7	3.8	98
San Fernando	7824					4.4	18.9			5.0	31.1
Mount_Stromlo_2	7825					2.3	7.7	1.5	100	2.6	8.9	1.7	99
Wettzell_SOSW	7827					1.4	5.7			1.6	8.2
Simosato	7838					5.3	11.6	3.4	99	4.0	11.7	3.0	87
Graz	7839					0.8	3.8	2.0	100	1.3	7.7	2.7	100
Herstmonceux	7840					0.7	3.2	1.6	100	1.3	6.9	1.9	100
Potsdam_3	7841					1.9	7.2	2.3	99	1.5	8.6	4.7	97
Grasse_MEO	7845					3.0	8.4	2.7	100	3.1	9.2	3.3	98
Matera_MLRO	7941					1.2	5.3	1.2	100	1.8	8.1	1.9	100
Wettzell	8834					0.9	4.6	2.0	100	1.3	7.2	4.2	100