Table 2.

Frost point hygrometer stations used in satellite water vapor intercomparison.

Station	Latitude	Longitude	No. of soundings	Period
Alert (CAN)	82	−61.5	6	1989–1991
Ny-Ålesund (NOR)	78.9	11.9	6	2002–2004
Thule (GRL)	77.5	−69	4	1994–1995
Kiruna (SWE)	67.8	20.2	19	1991–2003
Sodankyla (FIN)	67.2	26.4	114	1996–2012
Fairbanks, AK (USA)	64.8	−147.7	4	1985–1997
Keflavik (ISL)	64	20.7	2	1994
Lindenberg (GER)	52.2	14.1	77	2006–2012
Laramie, WY (USA)	41.3	−105.6	5	1983–1989
Boulder (USA)	40	− 105.2	397	1980–2014
Beltsville, MD (USA)	39	− 76.9	37	2006–2011
Washington, DC (USA)	38.9	− 77	129	1964–1980
Crows Landing, CA (USA)	37.4	− 121.2	3	1993
Lamont, OK (USA)	36.6	− 97.5	12	2003
Edwards AFB, CA (USA)	34.9	− 117.9	4	1991
Dagett, CA (USA)	34.8	− 117	1	1992
Huntsville, AL (USA)	34.7	− 86.7	2	2002
Fort Sumner, NM (USA)	34.5	− 104.3	10	1996–2004
Wrightwood, CA (USA)	34.4	− 117.7	40	2006–2009
Midland, TX (USA)	31.9	− 102.2	1	2004
Palestine, TX (USA)	31.8	− 95.6	8	1981–1985
Lhasa (CHN)	29.7	91.1	20	2010–2012
Kunming (CHN)	25	102.7	36	2009–2012
Tengchong (CHN)	25	98.5	12	2010
Yangjiang (CHN)	21.9	112	12	2010
Hanoi (VNM)	21	105.8	23	2007–2011
Hilo, HI (USA)	19.7	−155.1	55	1991–2014
Pago Pago (ASM)	14.3	− 170.7	5	1986–1988
San Jose (CRI)	10	− 84.1	167	2005–2014
Tarawa (KIR)	1.4	172.9	10	2005–2010
Kototabang (IDN)	−0.2	100.3	9	2007–2008
San Cristobal (ECU)	− 0.9	−89.6	47	1998–2007
Biak (IDN)	− 1.2	136.1	34	2006–2011
Bandung (IDN)	− 6.9	107.6	8	2003–2004
Juazeiro do Norte (BRA)	− 7.2	−39.3	5	1997
Watukosek (IDN)	− 7.5	112.6	7	2001–2003
R/V Mirai-Cindy	− 8	80.5	39	2011
Vickers Cruise	− 9.4	160	14	1993
La Reunion (REU)	−21.1	55.5	11	2005–2011
Lauder (NZL)	−45	169.7	121	1992–2014
McMurdo Station (ATA)	− 77.8	166.7	31	1987–1999
South Pole (ATA)	− 90	0	22	1990–1994