<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 11:30:00.000"
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="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" >
2026.03.20 (079) 11:30:00</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">
FF202607903201130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.840" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.258" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.700" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="130.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="130.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="130.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.434" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.872" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="314.383" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.281" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.147" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.550" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="105.866" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.027" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.058" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.060" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.350" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="133">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
155.000 155.000 152.500 150.000 150.000 147.500 145.000 142.500 140.000 138.750 137.500 136.250 135.000 135.000 130.000 130.000 150.833 171.667 192.500 213.333 234.167 255.000 255.000 255.000 258.750 262.500 266.250 270.000 275.000 275.000 280.000 285.000 285.000 285.000 287.500 290.000 295.000 285.000 290.000 290.000 290.000 292.500 295.000 297.500 300.000 300.000 301.667 303.333 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 315.000 316.250 317.500 318.750 320.000 321.250 322.500 323.750 325.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 422.512 425.434 428.877 432.990 437.994 444.212 452.145 462.619 477.085 498.366 532.757
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 54 45 48 51 0 51 0 0 0 54 57 57 60 0 0 0 0 0 54 54 60 0 0 0 57 60 57 0 48 57 60 0 54 48 51 63 63 57 0 0 0 60 57 0 0 54 63 69 63 0 63 66 69 66 63 66 0 0 0 0 0 0 0 60 0 57 54 66 63 63 69 57 63 72 60 66 72 72 66 69 54 60 57 51 57 66 60 69 72 0 72 75 63 66 51 60 66 72 69 69 0 60 66 69 72 72 69 54 57 60 48 54 60 63 60 57 60 57 63 57 54 63 60 57 57 57 57 57 45 0
</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 1.171875 -0.390625 -2.734375 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 1.171875 2.734375 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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="Es" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 115.000 114.000 113.000 112.000 111.000 110.000 115.000 120.000 115.000 117.500 120.000 122.500 125.000 127.500 130.000 132.500 135.000 137.500 140.000 140.000 140.000 140.000 135.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 0 0 0 60 0 57 60 0 63 0 0 0 0 0 0 0 57 60 60 54 60
</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 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
</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" >
89.568 90.0 95.0 100.0 105.0 110.0 113.796 115.0 117.592 120.0 121.388 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 314.383 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.93 2.486 2.779 2.872 2.75 2.75 2.75 2.827 2.872 3.289 3.598 3.83 4.028 4.208 4.375 4.534 4.688 4.839 4.987 5.134 5.281 5.428 5.577 5.727 5.879 6.034 6.193 6.356 6.523 6.697 6.876 7.063 7.258 7.461 7.674 7.896 8.128 8.368 8.613 8.857 9.093 9.313 9.507 9.669 9.795 9.884 9.936 9.95 9.95 9.942 9.922 9.89 9.847 9.794 9.732 9.66 9.581 9.494 9.4 9.3 9.193 9.082 8.966 8.846 8.722 8.595 8.466 8.334 8.2 8.064 7.927 7.789 7.651 7.512 7.372 7.233 7.095 6.956 6.819 6.682 6.546 6.412 6.279 6.147 6.016 5.887 5.76 5.634 5.511 5.389 5.268 5.15 5.034 4.919 4.807 4.697 4.588 4.482 4.377 4.275 4.175 4.076 3.98 3.885 3.793 3.702 3.613 3.527 3.442 3.359 3.277 3.198 3.12 3.044 2.97 2.897 2.826 2.757 2.689 2.623 2.559 2.495 2.434 2.374 2.315 2.258 2.202 2.147 2.094 2.042 1.991 1.941 1.893 1.846 1.8 1.755 1.711 1.668 1.626 1.586 1.546 1.507 1.469 1.433 1.397 1.362 1.327 1.294 1.262 1.23 1.199 1.169 1.139 1.111 1.083 1.056 1.029 1.003 0.978 0.953 0.929 0.906 0.883 0.861 0.839 0.818 0.797 0.777 0.758 0.739 0.72 0.702 0.684 0.667 0.65 0.634 0.618 0.602 0.587 0.572 0.558 0.544 0.53 0.516 0.503 0.491

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.872" PeakHeight="110.0" Num="3" Error="0.0">
-30.085 12.541 -2.888
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.872" EndFrequency="9.95" PeakHeight="314.383" Num="5" zHalfNm="234.281" Error="10.35">
-170.833 -40.65 13.046 8.505 -3.063
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.388" Depth="0.122"/>
<TopsideChapman PeakHeight="314.383" PeakDensity="1228318.9" PeakScaleHeight="61.058" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
