<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 11:30:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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) 11:30:00</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">
FF202607403151130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.971" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.785" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.900" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.200" 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="24" Val="112.498" Name="h`E" 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="10.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="391.033" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.866" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="308.971" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.460" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.147" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="92.381" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.996" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.592" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="113.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="138">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 227.500 230.000 230.000 230.000 230.000 235.000 235.000 235.000 238.000 241.000 244.000 247.000 250.000 250.000 255.000 255.000 257.500 260.000 260.000 260.000 265.000 270.000 270.000 272.500 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 286.667 288.333 290.000 291.667 293.333 295.000 295.000 295.000 295.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 311.667 313.333 315.000 316.500 318.000 319.500 321.000 322.500 324.000 325.500 327.000 328.500 330.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 360.000 360.000 365.000 365.000 360.000 365.000 370.000 372.500 375.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 387.841 391.033 394.643 398.759 403.497 409.009 415.500 423.259 432.695 444.419 459.379 479.127 506.400
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 0 0 51 54 57 48 0 0 0 0 57 63 54 57 0 57 0 60 0 51 60 0 51 45 0 54 45 63 66 63 0 57 0 0 0 0 63 63 63 60 0 0 63 63 69 66 63 63 66 57 0 0 60 63 66 63 66 0 0 0 63 0 0 57 0 0 0 0 0 0 0 0 0 45 54 54 60 57 45 57 0 60 48 57 66 72 72 69 69 69 69 72 69 69 0 72 72 63 0 0 0 48 48 51 57 57 57 60 63 51 57 45 54 57 57 48 54 54 51 57 57 54 54 57 57 57 54 54 54 54 51 51 0 51 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 1.953125 -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 -1.953125 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -2.734375 -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 -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 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
112.498 114.801 118.586
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 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" >
89.545 90.0 95.0 100.0 105.0 110.0 113.824 115.0 117.649 120.0 121.473 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 308.971 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.023 2.605 2.912 3.01 2.882 2.882 2.882 2.961 3.01 3.107 3.245 3.384 3.525 3.668 3.814 3.964 4.118 4.277 4.44 4.609 4.784 4.966 5.154 5.35 5.554 5.767 5.989 6.221 6.464 6.716 6.98 7.255 7.539 7.834 8.136 8.443 8.753 9.06 9.36 9.645 9.908 10.144 10.344 10.504 10.618 10.684 10.7 10.7 10.687 10.656 10.609 10.547 10.471 10.382 10.281 10.17 10.048 9.918 9.781 9.636 9.486 9.33 9.17 9.006 8.839 8.67 8.499 8.326 8.153 7.979 7.806 7.633 7.46 7.289 7.118 6.95 6.783 6.618 6.455 6.294 6.136 5.98 5.827 5.677 5.529 5.384 5.242 5.103 4.967 4.834 4.703 4.576 4.451 4.329 4.21 4.094 3.981 3.87 3.762 3.657 3.555 3.455 3.358 3.263 3.171 3.081 2.993 2.908 2.825 2.745 2.666 2.59 2.516 2.444 2.373 2.305 2.239 2.174 2.112 2.051 1.991 1.934 1.878 1.824 1.771 1.719 1.67 1.621 1.574 1.528 1.484 1.441 1.399 1.358 1.319 1.28 1.243 1.207 1.172 1.137 1.104 1.072 1.041 1.01 0.981 0.952 0.924 0.897 0.871 0.846 0.821 0.797 0.774 0.751 0.729 0.708 0.687 0.667 0.648 0.629 0.61 0.593 0.575 0.558 0.542 0.526 0.511 0.496 0.481 0.467 0.454 0.44 0.427 0.415 0.403 0.391 0.38 0.368 0.358 0.347 0.337 0.327 0.318 0.308 0.299 0.291

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.01" PeakHeight="110.0" Num="3" Error="0.0">
-30.203 12.715 -2.967
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.01" EndFrequency="10.7" PeakHeight="308.971" Num="5" zHalfNm="240.46" Error="1.702">
-150.709 -38.164 -0.634 1.997 0.012
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.473" Depth="0.128"/>
<TopsideChapman PeakHeight="308.971" PeakDensity="1420471.5" PeakScaleHeight="52.592" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
