<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-26 -085 10:50:00.000"
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 0 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" >
2026.03.26 (085) 10:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608503261050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="31" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.993" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.872" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.500" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.000" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.760" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" 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="91.399" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="95.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="94.540" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.228" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="386.600" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.622" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="299.375" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="231.485" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.933" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.800" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="92.378" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.810" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.379" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="105.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 225.000 226.111 227.222 228.333 229.444 230.556 231.667 232.778 233.889 235.000 235.000 240.000 240.000 242.500 245.000 247.500 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 261.250 262.500 263.750 265.000 265.000 267.500 270.000 270.000 275.000 275.000 275.000 276.667 278.333 280.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.833 286.667 287.500 288.333 289.167 290.000 292.500 295.000 295.000 295.000 295.000 295.000 295.000 295.000 297.000 299.000 301.000 303.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 376.862 378.917 381.197 383.742 386.600 389.833 393.520 397.764 402.700 408.515 415.464 423.917 434.419 447.820 465.512 489.948
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 0 0 48 0 45 0 0 60 54 57 57 0 57 0 0 63 0 57 60 60 60 0 48 57 0 54 0 0 0 45 45 0 60 60 66 66 66 0 0 63 63 69 72 69 66 66 66 63 66 66 0 0 0 0 0 63 0 57 57 63 63 66 63 63 0 0 0 0 51 51 0 0 0 0 69 69 72 72 75 75 66 0 69 75 0 66 72 72 75 63 0 69 0 75 72 69 72 72 75 72 72 57 63 66 66 66 63 60 60 54 57 57 51 51 57 54 63 66 63 60 60 57 60 57 60 57 60 60 57 57 60 60 60 60 57 54 54 51 54 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 -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 2.734375 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 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 -0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="16">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
91.399 91.833 92.297 92.794 93.330 93.908 94.538 95.229 95.993 96.848 97.820 98.949 100.302 102.001 104.321 108.127
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 0 66 0 63 0 0 0 0 0 0 66 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 110.000 108.333 106.667 105.000 103.333 101.667 100.000 105.000 103.333 101.667 100.000 98.333 96.667 95.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 51 0 0 0 0 0 0 51 0 0 0 48 0 45
</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 -2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
87.163 90.0 94.54 95.0 99.52 100.0 104.499 105.0 109.479 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 299.375 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.156 2.76 2.759 2.63 2.63 2.63 2.643 2.76 2.773 2.897 3.019 3.141 3.265 3.391 3.521 3.655 3.795 3.942 4.095 4.257 4.428 4.609 4.801 5.006 5.224 5.455 5.701 5.961 6.235 6.521 6.819 7.125 7.437 7.753 8.069 8.383 8.693 8.994 9.284 9.561 9.818 10.053 10.258 10.427 10.553 10.628 10.65 10.65 10.638 10.607 10.56 10.497 10.419 10.327 10.224 10.109 9.984 9.851 9.709 9.561 9.406 9.246 9.082 8.914 8.744 8.57 8.396 8.22 8.043 7.866 7.689 7.513 7.338 7.164 6.991 6.82 6.651 6.484 6.32 6.158 5.999 5.842 5.688 5.537 5.388 5.243 5.101 4.962 4.825 4.692 4.562 4.435 4.311 4.19 4.071 3.956 3.844 3.734 3.627 3.523 3.422 3.323 3.227 3.134 3.043 2.955 2.868 2.785 2.703 2.624 2.547 2.473 2.4 2.33 2.261 2.194 2.13 2.067 2.006 1.946 1.889 1.833 1.778 1.726 1.674 1.625 1.576 1.53 1.484 1.44 1.397 1.356 1.315 1.276 1.238 1.201 1.165 1.131 1.097 1.064 1.032 1.001 0.972 0.943 0.914 0.887 0.861 0.835 0.81 0.786 0.762 0.739 0.717 0.696 0.675 0.655 0.635 0.616 0.598 0.58 0.563 0.546 0.529 0.514 0.498 0.483 0.469 0.455 0.441 0.428 0.415 0.403 0.391 0.379 0.368 0.357 0.346 0.336 0.326 0.316 0.306 0.297 0.288 0.28 0.271 0.263 0.255 0.248

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.76" PeakHeight="94.54" Num="3" Error="0.628">
-10.835 4.478 -1.02
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.76" EndFrequency="10.65" PeakHeight="299.375" Num="5" zHalfNm="231.485" Error="2.289">
-151.526 -37.657 -1.387 -0.856 1.53
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.939" Depth="0.13"/>
<TopsideChapman PeakHeight="299.375" PeakDensity="1407227.0" PeakScaleHeight="51.379" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
