<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 20:10:00.000"
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 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" >
2026.03.19 (078) 20:10:00</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">
FF202607803192010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.878" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.080" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="416.172" 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="2.125" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="316.698" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.686" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.685" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.551" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.608" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.834" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="120.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="52">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 371.250 372.500 373.750 375.000 376.250 377.500 378.750 380.000 381.667 383.333 385.000 385.000 385.000 385.000 385.000 385.000 385.000 390.000 390.625 391.250 391.875 392.500 393.125 393.750 394.375 395.000 395.625 396.250 396.875 397.500 398.125 398.750 399.375 400.000 401.250 402.500 403.750 406.402 409.325 412.564 416.172 420.216 424.781 429.974 435.934 442.845 450.954 460.602 472.272 486.677 504.903
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 45 0 0 57 0 0 60 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 0 45 54 0 54 48 0 0 0 0 0 0 0 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 -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 -1.953125 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 1.953125 1.171875 -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 1.953125 -0.390625 0.390625 -1.171875 1.171875 -1.953125 -2.734375
</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" >
89.727 90.0 95.0 100.0 105.0 110.0 115.0 117.525 120.0 125.0 125.05 130.0 132.575 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 316.698 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.425 1.84 2.056 2.125 2.068 1.995 1.995 1.995 1.995 2.081 2.125 2.218 2.41 2.609 2.82 3.046 3.288 3.546 3.818 4.101 4.391 4.683 4.974 5.262 5.547 5.826 6.1 6.369 6.633 6.893 7.15 7.402 7.652 7.9 8.145 8.389 8.63 8.871 9.109 9.346 9.58 9.81 10.033 10.247 10.442 10.61 10.734 10.796 10.8 10.796 10.777 10.741 10.691 10.627 10.55 10.461 10.362 10.253 10.135 10.008 9.875 9.736 9.59 9.44 9.286 9.128 8.967 8.804 8.639 8.472 8.305 8.137 7.969 7.801 7.633 7.467 7.301 7.137 6.974 6.812 6.653 6.496 6.341 6.188 6.037 5.889 5.743 5.6 5.459 5.321 5.186 5.053 4.923 4.796 4.671 4.549 4.43 4.313 4.2 4.088 3.979 3.873 3.77 3.669 3.57 3.474 3.38 3.288 3.199 3.112 3.027 2.945 2.864 2.786 2.709 2.635 2.562 2.492 2.423 2.356 2.291 2.228 2.166 2.106 2.048 1.991 1.936 1.882 1.83 1.779 1.73 1.681 1.635 1.589 1.545 1.502 1.46 1.419 1.379 1.341 1.303 1.267 1.232 1.197 1.164 1.131 1.099 1.069 1.039 1.01 0.981 0.954 0.927 0.901 0.876 0.851 0.828 0.804 0.782 0.76 0.739 0.718 0.698 0.678 0.659 0.641 0.623 0.605 0.588 0.572 0.556 0.54 0.525 0.51 0.496 0.482 0.468 0.455 0.442 0.43 0.418 0.406 0.395 0.384 0.373 0.362

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.125" PeakHeight="110.0" Num="3" Error="0.0">
-29.25 11.365 -2.388
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.125" EndFrequency="10.8" PeakHeight="316.698" Num="5" zHalfNm="239.686" Error="3.231">
-166.868 -29.467 18.971 -8.965 2.206
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.575" Depth="0.13"/>
<TopsideChapman PeakHeight="316.698" PeakDensity="1447146.4" PeakScaleHeight="54.834" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
