<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 04:10:00.000"
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" >
2026.03.15 (074) 04:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607403150410009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.057" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.870" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.850" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="332.731" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.446" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.040" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="139.406" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.964" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.529" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 213.333 216.667 220.000 215.000 215.000 215.000 215.000 220.000 222.000 224.000 226.000 228.000 230.000 230.000 225.000 220.000 220.000 223.333 226.667 230.000 230.000 228.333 226.667 225.000 225.000 235.000 235.000 235.000 235.000 235.000 235.000 237.000 239.000 241.000 243.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 260.000 262.500 265.000 260.000 265.000 270.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 285.000 285.000 285.000 290.000 295.000 295.000 300.000 300.000 305.000 310.000 310.000 320.000 320.000 325.000 335.000 340.000 345.000 355.000 360.000 370.000 380.000 392.094 405.903 421.820 440.365 462.251 488.467 520.441 560.304 611.386
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 0 63 66 0 63 66 66 0 0 0 0 57 63 0 60 63 0 0 63 69 0 0 69 0 69 69 72 0 0 72 0 0 0 0 57 60 57 66 0 0 57 63 57 57 72 60 0 72 60 69 0 63 69 0 57 66 51 66 66 66 60 72 69 69 69 51 69 69 69 66 69 69 69 72 69 57 69 69 69 69 66 63 63 57 0 63 51 57 60 57 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 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 -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 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="186">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.333 135.0 140.0 145.0 150.0 155.0 156.667 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.731 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.332 0.301 0.253 0.204 0.204 0.204 0.204 0.204 0.204 0.204 0.225 0.258 0.29 0.322 0.354 0.394 0.452 0.546 0.729 1.178 2.091 2.982 3.592 4.039 4.391 4.681 4.927 5.139 5.325 5.49 5.635 5.765 5.88 5.983 6.075 6.156 6.227 6.289 6.343 6.388 6.425 6.455 6.477 6.491 6.499 6.5 6.499 6.494 6.484 6.468 6.448 6.424 6.395 6.362 6.325 6.285 6.241 6.194 6.144 6.092 6.037 5.979 5.92 5.858 5.795 5.73 5.664 5.597 5.528 5.458 5.388 5.316 5.245 5.172 5.099 5.026 4.953 4.879 4.806 4.733 4.659 4.586 4.513 4.441 4.369 4.297 4.226 4.155 4.085 4.015 3.946 3.878 3.81 3.743 3.677 3.611 3.547 3.483 3.42 3.358 3.296 3.236 3.176 3.117 3.059 3.002 2.945 2.89 2.835 2.781 2.728 2.676 2.625 2.575 2.525 2.476 2.428 2.381 2.335 2.289 2.245 2.201 2.158 2.115 2.074 2.033 1.993 1.953 1.915 1.877 1.839 1.803 1.767 1.732 1.697 1.663 1.63 1.598 1.566 1.534 1.503 1.473 1.444 1.415 1.386 1.358 1.331 1.304 1.278 1.252 1.227 1.202 1.178 1.154 1.13 1.107 1.085 1.063 1.041 1.02 1.0 0.979 0.959 0.94 0.921 0.902 0.884 0.866 0.848 0.831 0.814 0.797 0.781 0.765 0.75 0.734 0.719 0.705 0.69 0.676

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.5" PeakHeight="332.731" Num="5" zHalfNm="233.446" Error="4.525">
-214.732 96.729 -40.088 8.356 -2.996
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.0" Depth="0.15"/>
<TopsideChapman PeakHeight="332.731" PeakDensity="524193.56" PeakScaleHeight="75.529" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
