<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 15:40:00.000"
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 F2x 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" >
2026.02.17 (048) 15:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604802171540009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.536" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.037" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.385" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.358" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="363.335" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.236" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.654" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="125.130" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.852" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.579" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="170.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.150" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 295.000 300.000 305.000 305.000 307.500 310.000 315.000 320.000 320.000 320.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 382.500 385.000 385.000 387.500 390.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 445.000 447.500 450.000 450.000 450.000 450.000 450.000 460.000 460.000 462.500 465.000 465.000 465.000 470.000 472.500 475.000 477.500 480.000 485.000 485.000 490.000 490.000 495.000 500.000 505.000 505.000 510.000 515.000 518.810 523.038 527.759 533.064 539.068 545.919 553.810 562.996 573.827 586.787
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 48 48 0 48 51 45 0 51 51 0 48 54 57 57 54 54 57 57 54 54 54 0 57 54 54 57 57 57 54 54 60 60 60 57 60 60 60 60 57 60 63 60 57 63 0 60 57 63 63 57 60 54 60 66 0 60 66 54 63 48 57 63 66 60 63 57 63 54 63 54 60 63 66 63 54 60 66 63 63 66 60 60 54 60 63 60 60 63 0 54 57 63 60 0 51 60 45 54 60 60 57 48 54 0 54 48 54 51 51 51 48 45 51 51 48 48 0 45 48 45 45 45 42 0 0
</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 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 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 -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 -1.953125 -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 -2.734375 -1.171875
</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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.57 113.14 114.71 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 363.335 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.277 2.929 3.275 3.385 3.262 3.262 3.385 3.396 3.561 3.708 3.846 3.979 4.11 4.24 4.37 4.5 4.632 4.766 4.902 5.04 5.181 5.325 5.472 5.623 5.776 5.933 6.094 6.258 6.425 6.595 6.768 6.944 7.123 7.304 7.487 7.673 7.86 8.049 8.24 8.432 8.625 8.819 9.014 9.21 9.407 9.604 9.801 9.998 10.194 10.389 10.581 10.768 10.947 11.113 11.258 11.37 11.437 11.45 11.449 11.44 11.421 11.391 11.351 11.303 11.246 11.182 11.109 11.03 10.944 10.852 10.755 10.652 10.545 10.433 10.317 10.198 10.075 9.95 9.822 9.692 9.56 9.426 9.291 9.155 9.018 8.88 8.742 8.604 8.465 8.327 8.188 8.051 7.914 7.777 7.641 7.506 7.373 7.24 7.108 6.978 6.849 6.721 6.595 6.47 6.347 6.225 6.105 5.987 5.87 5.755 5.641 5.53 5.42 5.311 5.205 5.1 4.997 4.895 4.796 4.698 4.602 4.507 4.414 4.323 4.233 4.145 4.059 3.974 3.891 3.81 3.73 3.651 3.574 3.499 3.425 3.352 3.281 3.212 3.143 3.076 3.011 2.947 2.884 2.822 2.762 2.702 2.644 2.588 2.532 2.478 2.424 2.372 2.321 2.271 2.222 2.174 2.127 2.081 2.036 1.992 1.949 1.906 1.865 1.825 1.785 1.746 1.708 1.671 1.635 1.599 1.565 1.531 1.497 1.465 1.433 1.402 1.371 1.341 1.312 1.283 1.255 1.228 1.201 1.175 1.15 1.124

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.385" PeakHeight="110.0" Num="3" Error="0.0">
-30.496 13.146 -3.165
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.385" EndFrequency="11.45" PeakHeight="363.335" Num="5" zHalfNm="266.236" Error="4.898">
-196.942 -67.167 16.512 -3.331 2.303
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.71" Depth="0.123"/>
<TopsideChapman PeakHeight="363.335" PeakDensity="1626581.9" PeakScaleHeight="70.579" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
