<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 19:10:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o 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" >
2026.03.13 (072) 19:10:00</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">
FF202607203131910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.531" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.095" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.050" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.510" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="96.227" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="94.999" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="4.910" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="506.199" 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="2.693" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="370.603" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.412" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.639" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.687" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.095" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.482" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="165.360" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="153">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.95 11.0 11.05 11.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 225.000 227.500 230.000 232.500 235.000 235.000 245.000 245.000 246.667 248.333 250.000 250.000 250.000 250.000 252.500 255.000 255.000 255.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 275.000 280.000 280.000 280.000 280.000 285.000 286.667 288.333 290.000 290.000 290.000 295.000 295.000 295.000 298.333 301.667 305.000 305.000 307.500 310.000 312.500 315.000 317.500 320.000 322.500 325.000 325.000 330.000 331.667 333.333 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 362.000 364.000 366.000 368.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 447.500 450.000 452.500 455.000 455.000 455.000 455.000 460.000 465.000 465.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 485.000 495.000 495.000 500.000 500.000 500.000 502.957 506.199 509.767 513.715 518.105 523.017 528.549 534.828 542.014 550.321 560.033 571.537 585.383 602.364
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54 0 54 0 54 51 45 51 0 0 45 0 57 51 0 57 0 45 0 0 0 63 60 0 63 60 66 0 60 63 0 63 63 0 0 0 0 60 66 66 60 57 0 66 66 0 48 0 0 0 0 0 48 54 45 0 0 51 57 51 57 63 57 63 60 66 69 63 66 57 0 54 0 0 60 66 63 69 63 69 60 66 69 63 69 57 63 63 63 54 63 69 63 69 72 69 69 66 66 63 54 63 69 60 66 72 72 72 60 66 69 0 0 45 54 60 63 66 66 54 60 66 63 63 63 60 66 57 63 57 63 60 48 51 48 54 51 45 48 51 51 51 48 0 45 42 45 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.171875 -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 -0.390625 -1.953125 -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 -1.953125 -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 -1.953125 -2.734375 -0.390625 2.734375 -0.390625 2.734375 0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
96.227 96.635 97.069 97.533 98.029 98.563 99.141 99.769 100.457 101.218
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 0 0 0 0 48 57
</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 -2.734375 -0.390625 0.390625 -0.390625 -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" >
90.0 94.999 95.0 99.636 100.0 104.273 105.0 108.91 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.603 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.51 2.51 2.395 2.395 2.395 2.413 2.51 2.533 2.642 2.755 2.873 2.995 3.123 3.257 3.396 3.541 3.692 3.849 4.011 4.178 4.35 4.525 4.704 4.885 5.068 5.252 5.437 5.623 5.809 5.995 6.181 6.366 6.551 6.736 6.92 7.103 7.286 7.469 7.652 7.834 8.016 8.198 8.38 8.562 8.745 8.928 9.111 9.294 9.478 9.661 9.844 10.027 10.207 10.384 10.555 10.717 10.862 10.983 11.066 11.1 11.1 11.096 11.082 11.058 11.025 10.983 10.933 10.875 10.809 10.737 10.659 10.574 10.484 10.388 10.288 10.184 10.076 9.964 9.848 9.73 9.609 9.486 9.361 9.234 9.106 8.977 8.846 8.715 8.583 8.45 8.318 8.185 8.053 7.921 7.789 7.658 7.527 7.397 7.268 7.14 7.013 6.887 6.762 6.639 6.517 6.396 6.276 6.158 6.042 5.927 5.813 5.701 5.591 5.482 5.375 5.27 5.166 5.063 4.963 4.864 4.766 4.671 4.576 4.484 4.393 4.304 4.216 4.13 4.045 3.962 3.88 3.8 3.722 3.645 3.569 3.495 3.422 3.351 3.281 3.212 3.145 3.079 3.014 2.95 2.888 2.827 2.768 2.709 2.652 2.596 2.541 2.487 2.434 2.382 2.332 2.282 2.234 2.186 2.139 2.094 2.049 2.005 1.962 1.92 1.879 1.839 1.8 1.761 1.724 1.687 1.65 1.615 1.58 1.546 1.513 1.481 1.449 1.418 1.387 1.357 1.328 1.3 1.272 1.244 1.218 1.191 1.166

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.51" PeakHeight="94.999" Num="3" Error="1.504">
-7.298 2.953 -0.654
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.51" EndFrequency="11.1" PeakHeight="370.603" Num="5" zHalfNm="270.412" Error="2.551">
-217.842 -60.065 24.364 -10.092 1.942
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.911" Depth="0.115"/>
<TopsideChapman PeakHeight="370.603" PeakDensity="1528660.0" PeakScaleHeight="71.482" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
