<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 19:00:00.000"
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" >
2026.03.16 (075) 19:00:00</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">
FF202607503161900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.574" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.399" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="11.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.753" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="385.064" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="296.121" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.612" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="123.317" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.827" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.662" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.350" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.280" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.500" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="155">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 275.000 275.000 280.000 285.000 290.000 290.000 290.000 295.000 297.500 300.000 302.500 305.000 307.500 310.000 312.500 315.000 320.000 320.000 322.500 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 341.429 342.857 344.286 345.714 347.143 348.571 350.000 350.000 350.000 350.000 352.500 355.000 355.000 365.000 365.000 365.000 365.000 365.000 370.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 382.500 385.000 387.500 390.000 395.000 395.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 400.000 401.667 403.333 405.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 430.000 431.429 432.857 434.286 435.714 437.143 438.571 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 445.000 455.000 455.000 460.000 461.250 462.500 463.750 465.000 465.000 470.000 474.000 478.000 482.000 486.000 490.000 490.000 495.000 499.532 504.537 510.093 516.295 523.263 531.150 540.150 550.514 562.581 576.806 593.826 614.554 640.350
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 57 60 63 60 57 60 60 57 0 0 0 0 0 60 0 66 57 66 51 63 69 66 66 69 66 66 66 57 63 0 0 0 0 66 0 66 66 69 51 0 63 54 63 69 0 0 69 0 63 69 0 60 66 69 69 0 69 0 63 54 0 66 72 69 0 66 69 69 66 57 0 0 66 69 0 69 0 60 60 57 66 66 66 66 66 66 66 66 66 66 63 66 66 66 63 63 63 63 60 60 66 66 63 60 60 60 54 63 0 0 0 0 45 0 54 0 60 48 0 54 57 57 54 0 45 51 45 0 0 0 48 45 45 0 0 0 0 48 48 51 48 0 0 42 0 51 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="43">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 5.05 5.1 5.15 5.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 125.000 123.333 121.667 120.000 119.000 118.000 117.000 116.000 115.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.556 111.111 111.667 112.222 112.778 113.333 113.889 114.444 115.000 120.000 120.000 120.000 120.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 57 0 0 0 0 63 51 54 0 63 63 60 0 0 0 0 54 66 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 0 45 0 0 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 0.390625 0.390625 -0.390625 -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
</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" >
89.589 90.0 95.0 100.0 105.0 110.0 114.351 115.0 118.703 120.0 123.054 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.064 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.85 2.383 2.664 2.753 2.63 2.63 2.63 2.667 2.753 2.811 2.959 3.104 3.246 3.387 3.526 3.665 3.804 3.943 4.082 4.222 4.363 4.506 4.65 4.796 4.944 5.094 5.248 5.404 5.564 5.727 5.894 6.065 6.241 6.421 6.607 6.798 6.996 7.199 7.409 7.626 7.851 8.083 8.323 8.57 8.825 9.087 9.355 9.628 9.903 10.179 10.451 10.717 10.971 11.211 11.431 11.627 11.798 11.941 12.053 12.134 12.183 12.2 12.2 12.194 12.176 12.146 12.106 12.055 11.995 11.925 11.847 11.761 11.667 11.567 11.46 11.348 11.23 11.107 10.98 10.849 10.715 10.577 10.436 10.293 10.148 10.001 9.853 9.703 9.553 9.402 9.25 9.099 8.947 8.796 8.644 8.494 8.344 8.195 8.047 7.9 7.754 7.61 7.467 7.325 7.185 7.046 6.91 6.774 6.641 6.509 6.38 6.252 6.126 6.002 5.879 5.759 5.641 5.524 5.41 5.298 5.187 5.078 4.972 4.867 4.764 4.663 4.564 4.466 4.371 4.277 4.186 4.096 4.007 3.921 3.836 3.753 3.671 3.591 3.513 3.436 3.361 3.288 3.216 3.145 3.076 3.009 2.942 2.878 2.814 2.752 2.691 2.632 2.574 2.517 2.461 2.406 2.353 2.301 2.25 2.2 2.151 2.103 2.056 2.01 1.966 1.922 1.879 1.837 1.796 1.756 1.717 1.678 1.641 1.604 1.568 1.533 1.499 1.465 1.433 1.4 1.369 1.338 1.308 1.279 1.25 1.222

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.753" PeakHeight="110.0" Num="3" Error="0.0">
-29.973 12.38 -2.818
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.753" EndFrequency="12.2" PeakHeight="385.064" Num="5" zHalfNm="296.121" Error="2.52">
-217.703 -53.442 4.464 5.95 -1.279
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.054" Depth="0.123"/>
<TopsideChapman PeakHeight="385.064" PeakDensity="1846650.1" PeakScaleHeight="68.662" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
