<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-27 -027 10:40:00.000"
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 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" >
2026.01.27 (027) 10:40:00</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">
FF202602701271040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.913" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.215" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="365.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.480" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="322.776" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.306" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.579" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="137.041" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.307" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.247" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="125.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.990" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 230.000 230.000 225.000 225.000 225.000 225.000 230.000 231.667 233.333 235.000 235.000 235.000 240.000 240.000 240.000 245.000 245.000 247.500 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 257.500 260.000 260.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 296.667 298.333 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 365.000 365.000 365.000 375.000 375.000 385.000 385.000 390.000 393.811 398.122 403.037 408.696 415.278 423.030 432.296 443.566 457.570 475.438 499.027 531.608 579.533 656.982
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 63 63 63 60 60 0 0 57 60 60 57 57 60 57 66 57 63 51 66 66 66 0 63 63 54 0 66 60 66 66 63 63 66 66 63 66 69 0 63 0 0 69 0 0 0 69 66 69 69 69 69 72 72 0 0 69 69 72 0 69 54 60 0 69 69 60 69 69 60 66 69 72 63 69 72 63 69 60 66 69 63 66 69 66 69 66 69 69 63 69 66 72 72 69 69 60 69 69 69 66 63 66 63 66 60 66 66 60 45 45 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 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 -1.953125 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" >
89.644 90.0 95.0 100.0 105.0 110.0 115.0 115.682 120.0 121.363 125.0 127.045 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.776 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.665 2.147 2.4 2.48 2.384 2.355 2.355 2.355 2.435 2.48 2.56 2.703 2.854 3.01 3.17 3.334 3.502 3.674 3.85 4.031 4.218 4.411 4.611 4.821 5.039 5.268 5.508 5.76 6.022 6.292 6.568 6.843 7.111 7.366 7.602 7.818 8.011 8.183 8.334 8.466 8.58 8.678 8.761 8.831 8.887 8.932 8.965 8.987 8.998 9.0 8.999 8.992 8.978 8.957 8.93 8.896 8.857 8.812 8.762 8.707 8.648 8.584 8.516 8.445 8.37 8.291 8.21 8.127 8.04 7.952 7.861 7.769 7.675 7.58 7.483 7.386 7.287 7.188 7.089 6.988 6.888 6.787 6.686 6.586 6.485 6.385 6.285 6.185 6.086 5.987 5.889 5.792 5.695 5.599 5.504 5.41 5.317 5.225 5.134 5.043 4.954 4.866 4.779 4.693 4.608 4.524 4.442 4.36 4.28 4.201 4.123 4.046 3.97 3.896 3.823 3.75 3.679 3.61 3.541 3.473 3.407 3.341 3.277 3.214 3.152 3.091 3.031 2.972 2.914 2.857 2.802 2.747 2.693 2.64 2.588 2.537 2.488 2.438 2.39 2.343 2.297 2.251 2.207 2.163 2.12 2.078 2.036 1.996 1.956 1.917 1.879 1.841 1.805 1.769 1.733 1.699 1.664 1.631 1.598 1.566 1.535 1.504 1.474 1.444 1.415 1.387 1.359 1.332 1.305 1.279 1.253 1.228 1.203 1.179 1.155 1.132 1.109 1.086 1.064 1.043 1.022 1.001 0.981 0.961 0.942 0.923

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.48" PeakHeight="110.0" Num="3" Error="0.0">
-29.693 11.98 -2.643
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.48" EndFrequency="9.0" PeakHeight="322.776" Num="5" zHalfNm="226.306" Error="3.21">
-197.515 11.46 -15.354 7.433 -1.755
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.045" Depth="0.125"/>
<TopsideChapman PeakHeight="322.776" PeakDensity="1004962.75" PeakScaleHeight="76.247" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
