<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-09 -040 17:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.09 (040) 17:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202604002091700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.540" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.118" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.258" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.299" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="380.982" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="278.350" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.110" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.737" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="63.073" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.580" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="171.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="160">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 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 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 212.500 215.000 217.500 220.000 222.500 225.000 225.000 230.000 235.000 241.111 247.222 253.333 259.444 265.556 271.667 277.778 283.889 290.000 290.000 292.500 295.000 300.000 302.500 305.000 305.000 306.667 308.333 310.000 315.000 315.000 320.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 351.923 353.846 355.769 357.692 359.615 361.538 363.462 365.385 367.308 369.231 371.154 373.077 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 387.500 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 411.250 412.500 413.750 415.000 416.250 417.500 418.750 420.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 435.000 435.000 435.000 437.500 440.000 437.500 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 460.000 465.000 465.000 465.000 470.000 475.000 480.000 480.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 521.053 527.663 534.911 542.893 551.726 561.556 572.559 584.961 599.045 615.179 633.845 655.691
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 48 0 51 54 54 48 0 45 0 0 0 0 45 0 54 54 0 51 51 0 51 48 0 0 45 48 51 51 51 48 0 51 54 54 54 54 57 60 57 60 57 54 51 57 57 54 57 0 54 54 57 0 0 48 0 0 0 0 0 0 0 0 0 54 60 66 66 66 63 63 66 66 66 69 69 0 66 69 63 45 66 63 0 66 63 0 48 69 66 0 0 0 0 0 0 0 66 51 0 63 0 66 63 60 60 54 48 51 0 60 0 45 0 60 54 57 60 57 57 60 57 0 0 54 0 0 42 48 0 45 45 45 0 45 42 45 0 45 42 0 0 0 0 48 48 45 0 42 0 45 0 42 0 42 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 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 -0.390625 -0.390625 -0.390625 1.171875 -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 -1.953125 -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 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 -0.390625 -0.390625 1.953125 -0.390625 -2.734375 -2.734375 -0.390625 0.390625 -0.390625 2.734375
</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" >
89.503 90.0 95.0 100.0 105.0 110.0 112.096 114.193 115.0 116.289 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.982 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.191 2.82 3.152 3.258 3.136 3.136 3.183 3.258 3.358 3.494 3.631 3.77 3.909 4.05 4.192 4.335 4.48 4.626 4.774 4.924 5.076 5.23 5.386 5.545 5.706 5.87 6.036 6.206 6.378 6.554 6.733 6.916 7.103 7.293 7.487 7.685 7.887 8.093 8.303 8.517 8.734 8.956 9.18 9.407 9.636 9.866 10.097 10.326 10.553 10.775 10.99 11.197 11.393 11.574 11.739 11.884 12.008 12.108 12.182 12.23 12.249 12.25 12.247 12.234 12.212 12.182 12.143 12.096 12.041 11.98 11.911 11.837 11.756 11.67 11.578 11.482 11.381 11.276 11.167 11.055 10.939 10.821 10.7 10.577 10.451 10.324 10.195 10.064 9.933 9.8 9.667 9.533 9.398 9.264 9.129 8.994 8.86 8.725 8.591 8.458 8.325 8.193 8.061 7.931 7.801 7.673 7.545 7.419 7.294 7.17 7.047 6.925 6.805 6.687 6.569 6.454 6.339 6.226 6.115 6.005 5.897 5.79 5.684 5.581 5.478 5.378 5.278 5.181 5.084 4.99 4.896 4.805 4.715 4.626 4.538 4.453 4.368 4.285 4.204 4.124 4.045 3.968 3.892 3.817 3.743 3.671 3.601 3.531 3.463 3.396 3.33 3.265 3.202 3.14 3.079 3.019 2.96 2.902 2.845 2.79 2.735 2.682 2.629 2.578 2.527 2.477 2.429 2.381 2.334 2.288 2.243 2.199 2.156 2.113 2.072 2.031 1.991 1.951 1.913 1.875 1.838 1.801 1.766 1.731 1.697 1.663

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.258" PeakHeight="110.0" Num="3" Error="0.0">
-30.403 13.007 -3.101
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.258" EndFrequency="12.25" PeakHeight="380.982" Num="5" zHalfNm="278.35" Error="5.284">
-223.026 -49.697 6.546 2.055 -0.571
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.289" Depth="0.122"/>
<TopsideChapman PeakHeight="380.982" PeakDensity="1861817.6" PeakScaleHeight="77.58" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
