<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-06 -065 18:40:00.000"
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 F2o 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" >
2026.03.06 (065) 18:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606503061840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.461" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.560" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.000" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.205" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.790" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.616" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.888" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="380.921" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.646" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.546" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="162.087" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="59.483" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="88.362" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="194.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 281.667 283.333 285.000 285.000 290.000 290.000 295.000 295.000 295.000 295.000 300.000 302.000 304.000 306.000 308.000 310.000 310.000 315.000 315.000 317.500 320.000 322.500 325.000 325.000 327.500 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 452.500 455.000 455.000 460.000 460.000 465.000 465.000 465.000 470.000 475.000 475.000 477.500 480.000 485.000 485.000 485.000 490.000 490.000 495.000 500.000 505.000 505.000 510.000 515.000 520.000 525.000 530.000 535.701 541.914 548.712 556.181 564.427 573.576 583.786 595.253 608.224 623.016 640.041 659.846 683.173
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 48 51 54 57 54 60 60 57 0 0 51 0 0 51 57 51 0 0 0 0 57 63 57 63 69 63 66 57 0 66 63 0 54 63 66 57 66 54 63 66 60 66 57 66 72 63 69 60 66 57 66 72 66 75 66 72 63 72 66 72 63 72 63 72 72 72 63 72 69 72 63 69 72 69 72 69 60 66 57 66 66 63 66 63 63 66 0 57 60 54 60 54 60 60 60 57 0 57 54 51 51 51 54 54 51 48 51 51 51 51 51 51 48 0 0 48 45 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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.205 100.889 101.645 102.491 103.453 104.570 105.909 107.591 109.891
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 57 57 0 0 51 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 2.734375 0.390625 0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="40">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25 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 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
104.286 105.000 105.000 104.500 104.000 103.500 103.000 102.500 102.000 101.500 101.000 100.500 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 100.000 102.500 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 107.500 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 51 51 0 0 0 0 57 0 0 0 0 69 0 0 69 69 63 54 48 0 0 57 63 0 60 66 63 0 63 63 0 48 48 0 0 54 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 -1.953125 -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 1.953125 -1.171875 0.390625 0.390625 1.171875 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 95.0 97.79 100.0 101.511 105.0 105.233 108.954 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.921 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.797 3.01 2.966 2.883 2.883 2.883 3.01 3.045 3.204 3.355 3.503 3.65 3.797 3.944 4.093 4.243 4.395 4.549 4.706 4.864 5.025 5.188 5.352 5.519 5.687 5.856 6.027 6.198 6.37 6.543 6.717 6.89 7.064 7.238 7.412 7.585 7.759 7.932 8.104 8.277 8.448 8.619 8.789 8.958 9.126 9.293 9.458 9.622 9.783 9.941 10.097 10.248 10.395 10.535 10.667 10.791 10.902 11.0 11.081 11.143 11.183 11.2 11.2 11.198 11.189 11.173 11.151 11.123 11.09 11.051 11.006 10.957 10.902 10.844 10.781 10.714 10.643 10.568 10.49 10.409 10.325 10.239 10.149 10.058 9.964 9.868 9.771 9.672 9.571 9.469 9.366 9.262 9.157 9.051 8.944 8.837 8.73 8.622 8.514 8.406 8.297 8.189 8.081 7.973 7.866 7.759 7.652 7.546 7.44 7.335 7.23 7.126 7.023 6.92 6.819 6.718 6.618 6.519 6.42 6.323 6.227 6.131 6.037 5.944 5.851 5.76 5.67 5.58 5.492 5.405 5.319 5.234 5.15 5.067 4.986 4.905 4.825 4.747 4.669 4.593 4.518 4.443 4.37 4.298 4.227 4.157 4.088 4.02 3.953 3.887 3.822 3.758 3.694 3.632 3.571 3.511 3.452 3.393 3.336 3.279 3.224 3.169 3.115 3.062 3.01 2.958 2.908 2.858 2.809 2.761 2.714 2.667 2.622 2.577 2.532 2.489 2.446 2.404 2.362 2.322 2.281 2.242 2.203 2.165 2.128 2.091 2.055

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.01" PeakHeight="97.79" Num="3" Error="1.599">
-11.502 4.842 -1.13
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.01" EndFrequency="11.2" PeakHeight="380.921" Num="5" zHalfNm="259.646" Error="2.821">
-242.033 -44.335 17.526 -4.746 1.621
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.164" Depth="0.127"/>
<TopsideChapman PeakHeight="380.921" PeakDensity="1556327.5" PeakScaleHeight="88.362" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
