<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 19:20:00.000"
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" >
2026.03.16 (075) 19:20:00</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">
FF202607503161920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="12.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.583" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.900" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.050" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.660" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="112.820" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.797" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.589" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="491.551" 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="2.614" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="375.117" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="277.469" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.663" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.900" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="134.213" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.373" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.656" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="169.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.230" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="7.100" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 377.500 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 426.000 427.000 428.000 429.000 430.000 430.000 432.500 435.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 441.667 443.333 445.000 445.000 445.000 445.000 450.000 451.000 452.000 453.000 454.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 466.667 468.333 470.000 470.000 472.382 474.950 477.728 480.743 484.025 487.613 491.551 495.893 500.705 506.067 512.079 518.867 526.591 535.460 545.749 557.828 572.208 589.618 611.127 638.375
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 63 60 66 69 63 63 66 60 66 66 57 60 0 66 72 69 69 72 72 69 63 69 69 69 69 66 66 72 69 66 66 69 72 72 69 63 63 60 63 66 63 66 63 63 69 57 0 66 0 0 57 51 0 57 57 63 57 0 60 0 63 0 0 63 60 60 57 0 0 54 0 0 60 60 57 60 45 54 51 0 0 54 0 0 54 0 60 66 63 54 57 0 54 54 54 57 57 57 45 51 0 0 42
</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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 1.953125 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
112.820 113.949 115.302 117.001
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 1.953125 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="84">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 119.583 119.167 118.750 118.333 117.917 117.500 117.083 116.667 116.250 115.833 115.417 115.000 120.000 117.500 115.000 115.000 117.500 120.000 120.000 110.000 115.000 114.167 113.333 112.500 111.667 110.833 110.000 111.250 112.500 113.750 115.000 120.000 120.000 117.500 115.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 117.500 115.000 115.000 115.000 115.000 115.000 125.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 125.000 120.000 120.000 120.000 120.000 117.500 115.000 115.000 115.000 115.000 115.000 115.000 117.500 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 69 69 0 51 0 0 0 57 0 0 54 45 0 0 0 0 0 0 51 63 54 48 0 0 45 60 60 66 66 0 0 54 0 0 75 0 54 0 72 66 66 0 66 0 0 66 63 63 60 63 69 66 69 72 69 75 72 60 75 75 0 69 0 66 69 0 66 54 66 66 0 69 0 72 66 63 69 66 69 72 72 69 69
</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 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 -0.390625 1.171875 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 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 -0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875
</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 95.0 100.0 100.797 105.0 105.817 110.0 110.836 115.0 115.856 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.117 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.227 2.652 2.66 2.572 2.534 2.534 2.534 2.639 2.66 2.785 2.956 3.148 3.351 3.56 3.769 3.973 4.173 4.367 4.558 4.744 4.927 5.108 5.287 5.464 5.641 5.817 5.994 6.17 6.348 6.526 6.706 6.887 7.07 7.255 7.443 7.633 7.826 8.022 8.221 8.424 8.63 8.839 9.053 9.27 9.491 9.715 9.942 10.172 10.403 10.634 10.864 11.09 11.31 11.52 11.717 11.895 12.049 12.176 12.271 12.33 12.35 12.35 12.345 12.328 12.302 12.265 12.219 12.164 12.1 12.029 11.95 11.865 11.772 11.674 11.57 11.461 11.348 11.23 11.108 10.982 10.854 10.722 10.588 10.451 10.313 10.173 10.032 9.889 9.746 9.601 9.457 9.312 9.167 9.021 8.877 8.732 8.588 8.445 8.302 8.161 8.02 7.88 7.742 7.604 7.468 7.334 7.201 7.069 6.939 6.81 6.683 6.558 6.434 6.312 6.191 6.073 5.956 5.841 5.727 5.616 5.506 5.397 5.291 5.186 5.084 4.982 4.883 4.785 4.689 4.595 4.502 4.411 4.322 4.234 4.148 4.063 3.98 3.899 3.819 3.741 3.664 3.588 3.514 3.442 3.371 3.301 3.233 3.165 3.1 3.035 2.972 2.91 2.85 2.79 2.732 2.675 2.619 2.564 2.51 2.458 2.406 2.356 2.306 2.258 2.21 2.164 2.118 2.074 2.03 1.987 1.945 1.904 1.864 1.825 1.786 1.749 1.712 1.676 1.64 1.605 1.571 1.538 1.506 1.474 1.443 1.412 1.382

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.66" PeakHeight="100.797" Num="3" Error="4.363">
-15.821 6.485 -1.461
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.66" EndFrequency="12.35" PeakHeight="375.117" Num="5" zHalfNm="277.469" Error="5.368">
-226.675 -51.627 21.847 -0.232 -2.574
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.059" Depth="0.126"/>
<TopsideChapman PeakHeight="375.117" PeakDensity="1892338.8" PeakScaleHeight="72.656" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
