<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 12:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.26 (026) 12:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602601261240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.432" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.321" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.125" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.235" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="366.407" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.833" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.692" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="161.852" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.178" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="88.089" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="197.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 240.000 245.000 251.250 257.500 263.750 270.000 275.000 278.333 281.667 285.000 288.333 291.667 295.000 297.500 300.000 300.000 300.000 305.000 305.000 305.000 307.500 310.000 315.000 315.000 316.667 318.333 320.000 320.000 322.308 324.615 326.923 329.231 331.538 333.846 336.154 338.462 340.769 343.077 345.385 347.692 350.000 350.000 355.000 355.000 358.333 361.667 365.000 368.333 371.667 375.000 375.000 375.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 430.000 435.000 435.000 440.000 440.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 485.000 490.000 500.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 530.000 540.000 540.000 545.000 550.000 555.000 560.000 570.000 578.753 588.738 600.236 613.617 629.387 648.246
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 45 0 0 0 48 51 0 0 48 0 0 51 45 45 51 51 54 54 51 0 54 51 54 0 0 0 51 0 51 0 51 0 0 0 0 0 0 0 0 51 54 57 57 0 0 0 45 0 51 57 54 45 0 45 57 54 57 54 51 45 57 60 60 54 57 60 60 57 63 63 60 57 54 51 57 57 57 60 60 57 57 60 60 60 57 57 57 60 60 54 54 48 57 57 57 57 57 60 54 45 51 42 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -2.734375 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.525 90.0 95.0 100.0 105.0 110.0 112.666 115.0 115.332 117.998 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.407 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.101 2.705 3.023 3.125 3.003 3.003 3.003 3.125 3.183 3.325 3.465 3.606 3.749 3.897 4.049 4.206 4.367 4.534 4.704 4.878 5.053 5.23 5.407 5.583 5.757 5.928 6.097 6.263 6.426 6.585 6.742 6.895 7.046 7.194 7.34 7.483 7.624 7.764 7.901 8.037 8.171 8.304 8.435 8.565 8.694 8.822 8.948 9.073 9.196 9.317 9.436 9.55 9.659 9.76 9.85 9.923 9.975 9.999 10.0 9.998 9.991 9.978 9.958 9.934 9.904 9.869 9.83 9.786 9.738 9.685 9.629 9.569 9.506 9.439 9.37 9.297 9.222 9.145 9.065 8.983 8.899 8.813 8.726 8.637 8.547 8.456 8.364 8.27 8.176 8.081 7.986 7.89 7.794 7.697 7.6 7.503 7.407 7.31 7.213 7.116 7.02 6.924 6.828 6.733 6.638 6.544 6.451 6.358 6.265 6.173 6.082 5.992 5.903 5.814 5.726 5.639 5.553 5.467 5.383 5.299 5.217 5.135 5.054 4.974 4.895 4.818 4.741 4.665 4.59 4.515 4.442 4.37 4.299 4.229 4.16 4.091 4.024 3.958 3.892 3.828 3.764 3.702 3.64 3.579 3.519 3.46 3.402 3.345 3.289 3.233 3.178 3.125 3.072 3.02 2.968 2.918 2.868 2.819 2.771 2.724 2.677 2.631 2.586 2.542 2.498 2.455 2.413 2.372 2.331 2.291 2.251 2.212 2.174 2.137 2.1 2.063 2.028 1.992 1.958 1.924 1.891 1.858 1.826 1.794 1.763 1.732

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.125" PeakHeight="110.0" Num="3" Error="0.0">
-30.298 12.853 -3.03
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.125" EndFrequency="10.0" PeakHeight="366.407" Num="5" zHalfNm="240.833" Error="4.359">
-220.252 -44.584 24.835 -11.398 2.99
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.998" Depth="0.122"/>
<TopsideChapman PeakHeight="366.407" PeakDensity="1240694.8" PeakScaleHeight="88.089" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
