<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 10:40:00.000"
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 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" >
2026.03.07 (066) 10:40:00</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">
FF202606603071040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="31" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.975" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.750" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.610" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="110.084" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="125.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="390.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.511" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.108" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.985" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.823" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.800" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="98.524" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.273" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.253" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.800" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="125">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 235.000 236.250 237.500 238.750 240.000 241.250 242.500 243.750 245.000 255.000 250.000 252.500 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 266.250 267.500 268.750 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 287.000 289.000 291.000 293.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 325.000 325.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 352.500 355.000 360.000 360.000 365.000 365.000 370.000 375.000 375.000 380.000 380.000 385.000 390.000 390.000 395.000 399.715 405.200 411.661 419.382 428.774 440.443 455.333 474.991 502.142
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 54 0 51 0 0 0 51 0 54 54 63 0 57 63 0 60 0 0 0 57 63 57 0 51 48 0 63 63 0 66 0 60 0 0 0 54 0 66 0 51 69 75 75 0 72 66 54 0 66 63 0 0 0 0 66 66 60 66 0 60 51 54 54 0 60 0 48 54 0 66 66 63 63 66 63 48 51 60 51 45 0 66 69 72 66 54 54 69 63 72 69 57 60 60 60 57 0 63 0 51 57 48 54 54 63 60 60 57 60 60 60 60 60 63 60 60 60 60 60 60 54 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 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -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 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.084 111.789 114.116
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="23">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 135.000 125.000 130.000 130.000 131.250 132.500 133.750 135.000 135.000 133.750 132.500 131.250 130.000 130.000 130.000 130.000 130.000 130.000 130.000 130.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 66 60 57 0 0 48 63 63 0 0 0 69 72 72 63 75 78 75 60 51 45
</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 -1.171875 -1.953125 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 -1.953125
</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" >
89.617 90.0 95.0 100.0 105.0 110.0 115.0 115.529 120.0 121.059 125.0 126.588 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.108 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.753 2.26 2.525 2.61 2.505 2.481 2.481 2.481 2.573 2.61 2.737 2.909 3.075 3.239 3.406 3.577 3.753 3.936 4.128 4.328 4.539 4.761 4.994 5.238 5.493 5.759 6.034 6.316 6.604 6.896 7.189 7.482 7.771 8.055 8.332 8.598 8.851 9.089 9.308 9.504 9.674 9.812 9.914 9.978 10.0 10.0 9.992 9.969 9.931 9.879 9.814 9.738 9.651 9.555 9.449 9.335 9.214 9.087 8.953 8.815 8.673 8.527 8.378 8.226 8.072 7.917 7.761 7.604 7.446 7.289 7.132 6.976 6.82 6.666 6.513 6.362 6.212 6.064 5.918 5.774 5.632 5.493 5.356 5.221 5.089 4.959 4.832 4.707 4.585 4.465 4.348 4.233 4.121 4.012 3.905 3.8 3.698 3.599 3.501 3.406 3.314 3.224 3.136 3.05 2.966 2.885 2.805 2.728 2.652 2.579 2.508 2.438 2.37 2.304 2.24 2.178 2.117 2.058 2.0 1.944 1.89 1.837 1.785 1.735 1.687 1.639 1.593 1.548 1.505 1.462 1.421 1.381 1.342 1.304 1.267 1.232 1.197 1.163 1.13 1.098 1.067 1.037 1.008 0.979 0.952 0.925 0.898 0.873 0.848 0.824 0.801 0.778 0.756 0.735 0.714 0.694 0.674 0.655 0.636 0.618 0.601 0.584 0.567 0.551 0.536 0.52 0.506 0.491 0.477 0.464 0.451 0.438 0.425 0.413 0.402 0.39 0.379 0.368 0.358 0.348 0.338 0.328 0.319 0.31 0.301 0.293

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.61" PeakHeight="110.0" Num="3" Error="0.0">
-29.831 12.176 -2.728
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.61" EndFrequency="10.0" PeakHeight="300.108" Num="5" zHalfNm="227.985" Error="2.335">
-152.093 -23.78 1.39 -0.172 1.135
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.588" Depth="0.129"/>
<TopsideChapman PeakHeight="300.108" PeakDensity="1240694.8" PeakScaleHeight="54.253" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
