<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 16:30:00.000"
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" >
2026.03.29 (088) 16:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608803291630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="15.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.832" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="43.186" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.100" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="15.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="330.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="330.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" 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="14.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.318" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.327" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="324.703" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.184" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.904" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.500" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="107.460" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="74.488" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.025" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.250" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="8.000" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7 13.75 13.8 13.85 13.9 13.95 14.0 14.05 14.1 14.15 14.2 14.25 14.3 14.35 14.4 14.45 14.5 14.55 14.6 14.65 14.7 14.75 14.8 14.85 14.9 14.95 15.0 15.05 15.1 15.15 15.2 15.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 341.667 343.333 345.000 342.500 340.000 345.000 342.500 340.000 342.500 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 348.333 346.667 345.000 345.000 345.000 345.000 347.500 350.000 355.000 353.333 351.667 350.000 355.000 355.385 355.769 356.154 356.538 356.923 357.308 357.692 358.077 358.462 358.846 359.231 359.615 360.000 360.000 365.000 363.333 361.667 360.000 361.667 363.333 365.000 365.000 365.000 366.250 367.500 368.750 370.000 372.500 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 390.000 390.000 390.000 390.000 392.500 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 440.000 445.000 450.000 450.000 455.000 460.000 467.168 475.485 485.249 496.876 510.953 528.347 550.386
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 0 60 51 54 0 54 0 51 48 45 51 54 60 60 63 63 63 63 63 63 60 63 60 60 60 63 63 63 66 63 66 63 66 66 0 66 0 0 63 0 60 57 0 57 0 57 42 0 0 0 45 0 48 0 48 0 0 54 0 57 51 0 57 42 0 0 60 54 0 0 0 0 0 0 0 0 0 0 0 0 63 66 51 0 0 66 0 0 66 0 63 0 57 0 60 45 51 54 0 0 0 57 57 60 60 57 0 45 48 54 57 48 54 57 45 51 54 54 54 57 51 54 51 57 54 57 54 57 57 54 51 48 48 54 54 51 51 51 51 48 48 45 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 115.000 115.000 115.000 115.000 115.132 115.263 115.395 115.526 115.658 115.789 115.921 116.053 116.184 116.316 116.447 116.579 116.711 116.842 116.974 117.105 117.237 117.368 117.500 117.632 117.763 117.895 118.026 118.158 118.289 118.421 118.553 118.684 118.816 118.947 119.079 119.211 119.342 119.474 119.605 119.737 119.868 120.000 117.500 115.000 115.000 115.000 115.000 115.000 116.000 117.000 118.000 119.000 120.000 120.000 120.000 115.000 115.000 115.357 115.714 116.071 116.429 116.786 117.143 117.500 117.857 118.214 118.571 118.929 119.286 119.643 120.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.714 116.429 117.143 117.857 118.571 119.286 120.000 120.000 120.000 120.000 120.000 120.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 48 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 66 0 48 63 0 51 51 0 0 0 0 66 66 0 69 60 0 0 0 0 0 0 0 0 0 0 0 0 54 75 75 75 72 69 69 69 69 0 0 0 0 0 0 69 69 69 66 66 60 60 51
</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 -2.734375 1.171875 1.953125 1.171875 -0.390625 2.734375 -1.171875 -1.171875 -1.953125 -2.734375 -1.171875 1.171875 2.734375 2.734375 -1.171875 2.734375 -1.953125 0.390625 -0.390625 0.390625 1.171875 -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
</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" >
89.494 90.0 95.0 100.0 105.0 110.0 111.847 113.695 115.0 115.542 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.703 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.232 2.872 3.21 3.318 3.195 3.195 3.282 3.318 3.546 3.836 4.145 4.454 4.754 5.043 5.323 5.594 5.859 6.12 6.379 6.636 6.893 7.151 7.411 7.673 7.94 8.211 8.487 8.769 9.058 9.355 9.66 9.974 10.299 10.634 10.979 11.336 11.702 12.078 12.46 12.844 13.225 13.596 13.948 14.273 14.561 14.806 15.0 15.14 15.224 15.25 15.25 15.238 15.206 15.155 15.087 15.001 14.9 14.785 14.657 14.516 14.364 14.202 14.031 13.852 13.666 13.473 13.274 13.07 12.863 12.651 12.437 12.221 12.003 11.783 11.563 11.342 11.122 10.902 10.683 10.464 10.248 10.032 9.819 9.608 9.399 9.192 8.988 8.787 8.588 8.393 8.2 8.011 7.824 7.641 7.461 7.285 7.111 6.941 6.774 6.61 6.45 6.293 6.139 5.989 5.841 5.697 5.556 5.418 5.283 5.151 5.022 4.896 4.773 4.653 4.536 4.421 4.309 4.2 4.093 3.989 3.887 3.788 3.691 3.597 3.505 3.415 3.328 3.242 3.159 3.078 2.998 2.921 2.846 2.772 2.701 2.631 2.563 2.497 2.432 2.369 2.308 2.248 2.19 2.133 2.078 2.024 1.971 1.92 1.87 1.821 1.774 1.728 1.683 1.639 1.597 1.555 1.515 1.475 1.437 1.399 1.363 1.327 1.293 1.259 1.226 1.194 1.163 1.133 1.103 1.075 1.047 1.019 0.993 0.967 0.942 0.917 0.893 0.87 0.847 0.825 0.803 0.782 0.762 0.742 0.723 0.704

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.318" PeakHeight="110.0" Num="3" Error="0.0">
-30.449 13.074 -3.131
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.318" EndFrequency="15.25" PeakHeight="324.703" Num="5" zHalfNm="247.184" Error="4.678">
-184.079 -37.804 11.739 3.764 -2.781
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.542" Depth="0.123"/>
<TopsideChapman PeakHeight="324.703" PeakDensity="2885390.8" PeakScaleHeight="59.025" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
