<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 11:10:00.000"
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 11 0 0 0 0 0 0 0 0 1 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" >
2026.03.13 (072) 11:10:00</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">
FF202607203131110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.227" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.953" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.450" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="135.000" Name="h`Es" 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="10.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.742" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="277.695" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.574" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.078" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.300" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="62.509" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.624" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.248" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="88.820" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="134">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.15 11.2 11.25 11.3 11.35 11.4 11.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 265.000 265.000 265.000 265.000 270.000 270.000 271.667 273.333 275.000 275.000 275.000 275.000 276.000 277.000 278.000 279.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 291.000 292.000 293.000 294.000 295.000 295.000 295.000 295.000 295.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 292.500 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.769 301.538 302.308 303.077 303.846 304.615 305.385 306.154 306.923 307.692 308.462 309.231 310.000 310.000 310.000 310.000 315.000 315.000 315.000 310.000 315.000 315.000 315.000 315.000 317.500 320.000 322.500 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 335.000 340.000 340.000 345.000 350.000 350.000 350.000 353.606 357.789 362.700 368.547 375.628 384.377 395.462 409.965
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 48 0 51 54 57 54 0 0 48 51 48 45 0 0 0 0 60 69 69 66 63 60 60 54 66 63 60 57 57 60 63 0 60 0 0 66 69 69 69 69 63 0 0 0 66 69 72 69 66 0 0 66 63 63 63 69 66 54 0 66 69 69 69 0 72 72 69 66 0 0 69 69 69 66 66 66 63 60 0 0 0 0 0 0 0 0 0 0 0 0 60 63 66 66 57 57 60 63 63 0 60 63 0 63 45 51 54 60 57 45 60 60 57 60 57 54 57 51 54 57 54 42 51 54 51 51 51 51 51 48 0 48
</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 0.390625 2.734375 0.390625 -0.390625 -0.390625 0.390625 -2.734375 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 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 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 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.3 3.35 3.4 3.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
155.000 145.000 145.000 141.667 138.333 135.000 134.545 134.091 133.636 133.182 132.727 132.273 131.818 131.364 130.909 130.455 130.000 130.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 57 0 0 54 0 0 0 0 0 0 48 0 0 0 48 0 51 63 57 0 57 54
</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 0.390625 -0.390625 2.734375 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="149">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.592 90.0 95.0 100.0 105.0 110.0 114.403 115.0 118.807 120.0 123.21 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 277.695 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.842 2.374 2.653 2.742 2.619 2.619 2.619 2.652 2.742 2.861 3.124 3.346 3.55 3.744 3.933 4.12 4.308 4.498 4.691 4.889 5.093 5.304 5.524 5.754 5.997 6.255 6.53 6.826 7.147 7.497 7.882 8.309 8.779 9.29 9.821 10.331 10.768 11.103 11.324 11.435 11.45 11.446 11.407 11.33 11.221 11.082 10.917 10.73 10.523 10.3 10.064 9.817 9.562 9.301 9.035 8.766 8.497 8.227 7.959 7.694 7.431 7.173 6.919 6.67 6.427 6.19 5.958 5.733 5.515 5.302 5.097 4.898 4.705 4.519 4.339 4.166 3.998 3.837 3.682 3.532 3.388 3.25 3.117 2.989 2.866 2.747 2.634 2.525 2.42 2.32 2.223 2.131 2.042 1.957 1.875 1.796 1.721 1.649 1.58 1.514 1.45 1.39 1.331 1.275 1.222 1.17 1.121 1.074 1.029 0.986 0.944 0.904 0.866 0.83 0.795 0.761 0.729 0.699 0.669 0.641 0.614 0.588 0.563 0.54 0.517 0.495 0.474 0.454 0.435 0.417 0.399 0.382 0.366 0.351 0.336 0.322 0.308 0.295 0.283 0.271 0.259 0.248 0.238 0.228 0.218 0.209 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.742" PeakHeight="110.0" Num="3" Error="0.0">
-29.962 12.365 -2.811
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.742" EndFrequency="11.45" PeakHeight="277.695" Num="5" zHalfNm="232.574" Error="3.372">
-120.46 -40.69 0.156 7.436 -0.927
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.21" Depth="0.123"/>
<TopsideChapman PeakHeight="277.695" PeakDensity="1626581.9" PeakScaleHeight="36.248" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
