<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 18:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 75% PACIFIC flags: Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.03.22 (081) 18:30:00</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">
FF202608103221830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.796" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.474" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.660" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.637" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="462.251" 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="2.915" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.131" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="328.318" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="255.904" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.514" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="94.953" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.019" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.236" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="128.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.060" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.75 10.8 10.85 10.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 250.000 255.000 257.222 259.444 261.667 263.889 266.111 268.333 270.556 272.778 275.000 275.000 280.000 280.000 280.000 280.000 280.000 283.333 286.667 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 321.667 323.333 325.000 325.000 327.500 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 352.000 354.000 356.000 358.000 360.000 360.000 363.333 366.667 370.000 370.000 370.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 460.000 460.000 462.251 465.563 470.916 481.041
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 51 51 0 48 0 0 0 0 0 0 45 57 48 54 60 57 48 0 0 51 57 0 54 48 48 60 60 57 63 63 57 60 63 66 66 66 0 69 66 0 69 69 69 0 69 66 66 57 45 0 60 54 0 66 63 66 66 63 60 69 66 63 60 69 66 69 0 72 0 0 0 0 69 69 0 0 51 60 63 54 57 60 48 57 63 66 60 66 69 63 66 60 66 69 72 66 51 57 63 66 57 63 63 66 63 63 57 60 63 63 63 63 60 60 60 54 54 51 54 57 54 54 54 51 54 51 48 45 48 0 45 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 1.953125 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 2.734375 -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 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 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="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.637 104.575
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 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" >
89.608 90.0 95.0 100.0 105.0 110.0 113.601 115.0 117.202 120.0 120.803 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 328.318 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.787 2.303 2.574 2.66 2.549 2.549 2.549 2.635 2.66 2.794 2.945 3.092 3.239 3.388 3.539 3.694 3.853 4.018 4.187 4.362 4.542 4.728 4.918 5.114 5.313 5.517 5.723 5.933 6.145 6.358 6.574 6.79 7.008 7.227 7.447 7.667 7.889 8.113 8.338 8.564 8.793 9.025 9.259 9.496 9.737 9.982 10.228 10.471 10.696 10.862 10.9 10.899 10.882 10.847 10.795 10.727 10.643 10.547 10.438 10.317 10.187 10.048 9.901 9.747 9.587 9.422 9.252 9.079 8.903 8.725 8.545 8.364 8.183 8.001 7.82 7.639 7.459 7.281 7.105 6.93 6.757 6.587 6.418 6.253 6.09 5.93 5.773 5.619 5.468 5.32 5.175 5.033 4.894 4.758 4.626 4.496 4.37 4.246 4.126 4.009 3.894 3.783 3.674 3.569 3.466 3.365 3.268 3.173 3.08 2.991 2.903 2.818 2.736 2.655 2.577 2.501 2.428 2.356 2.287 2.219 2.153 2.089 2.028 1.967 1.909 1.852 1.797 1.744 1.692 1.641 1.593 1.545 1.499 1.454 1.411 1.369 1.328 1.288 1.25 1.212 1.176 1.141 1.107 1.074 1.042 1.01 0.98 0.951 0.922 0.895 0.868 0.842 0.817 0.792 0.768 0.745 0.723 0.701 0.68 0.66 0.64 0.621 0.602 0.584 0.567 0.55 0.533 0.517 0.502 0.487 0.472 0.458 0.444 0.431 0.418 0.405 0.393 0.381 0.37 0.359 0.348 0.338 0.327 0.318 0.308 0.299

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.66" PeakHeight="110.0" Num="3" Error="0.0">
-29.881 12.249 -2.76
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.66" EndFrequency="10.9" PeakHeight="328.318" Num="5" zHalfNm="255.904" Error="3.174">
-160.062 -64.023 21.271 -7.058 2.357
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.803" Depth="0.111"/>
<TopsideChapman PeakHeight="328.318" PeakDensity="1474069.5" PeakScaleHeight="51.236" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
