<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 01:30:00.000"
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="14.0">
<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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.10.29 (302) 01:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630210290130009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.423" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="39.025" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" Name="h`F2" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="331.631" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="318.021" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.530" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.820" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="13.932" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.061" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="26.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="178">
<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 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 355.000 355.000 351.667 348.333 345.000 350.000 345.000 335.000 335.000 330.000 328.333 326.667 325.000 317.500 310.000 325.000 325.000 325.001 325.002 325.002 325.003 325.004 325.005 325.006 325.006 325.007 325.008 325.009 325.010 325.011 325.012 325.012 325.013 325.014 325.015 325.016 325.017 325.018 325.019 325.020 325.021 325.022 325.023 325.024 325.026 325.027 325.028 325.029 325.030 325.031 325.032 325.034 325.035 325.036 325.038 325.039 325.040 325.041 325.043 325.044 325.046 325.047 325.049 325.050 325.052 325.053 325.055 325.056 325.058 325.060 325.061 325.063 325.065 325.067 325.068 325.070 325.072 325.074 325.076 325.078 325.080 325.082 325.084 325.087 325.089 325.091 325.093 325.096 325.098 325.101 325.103 325.106 325.109 325.111 325.114 325.117 325.120 325.123 325.126 325.129 325.133 325.136 325.139 325.143 325.146 325.150 325.154 325.158 325.162 325.166 325.170 325.175 325.179 325.184 325.189 325.194 325.199 325.205 325.210 325.216 325.222 325.228 325.234 325.241 325.248 325.255 325.262 325.270 325.278 325.286 325.295 325.304 325.313 325.323 325.334 325.345 325.356 325.368 325.380 325.394 325.408 325.422 325.438 325.455 325.472 325.491 325.510 325.532 325.554 325.578 325.604 325.632 325.663 325.696 325.731 325.770 325.813 325.860 325.912 325.969 326.034 326.107 326.189 326.284 326.393 326.520 326.671 326.852 327.074 327.352 327.711 328.192 328.869 329.895 331.631 335.204 346.807
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 57 0 0 57 63 60 60 60 63 60 0 60 0 60 60 63 0 63 63 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 0 0 0 0 0 0 0 51 0 0 0 0 0 0 0 51 0 0 0 0 0 48 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 -0.390625 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 1.953125 0.390625 2.734375 2.734375 2.734375 2.734375 0.390625 1.953125 2.734375 2.734375 -2.734375 2.734375 2.734375 2.734375 -1.171875 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 -0.390625 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 1.171875 -0.390625 2.734375 2.734375 -1.953125 -1.953125 -1.171875 1.171875 -2.734375 1.171875 -1.171875 -1.171875 1.171875 -0.390625 2.734375 1.171875 -1.171875 1.171875 1.171875 0.390625 1.953125 1.953125 1.953125 -1.171875 -1.171875 0.390625 1.953125 1.953125 2.734375 1.953125 1.953125 -0.390625 2.734375 2.734375 1.953125 2.734375 1.171875 1.953125 1.953125 2.734375 2.734375 1.171875 1.171875 2.734375 1.953125 -1.171875 1.171875 2.734375 2.734375 2.734375 1.171875 2.734375 -0.390625 -1.171875 1.171875 2.734375 -2.734375 2.734375 1.953125 -0.390625 -0.390625 1.953125 0.390625 2.734375 1.953125 2.734375 2.734375 2.734375 1.953125 1.953125 0.390625 0.390625 2.734375 0.390625 1.953125 -0.390625 1.953125 0.390625 1.953125 1.953125 1.171875 1.953125 2.734375 1.953125 -2.734375 2.734375 2.734375 -2.734375 2.734375 2.734375 2.734375 -2.734375 2.734375 -0.390625 -1.953125 2.734375 -2.734375 2.734375 -0.390625 2.734375 1.171875 -1.953125 0.390625 2.734375 -2.734375 2.734375 0.390625 -2.734375 2.734375 2.734375 -1.953125 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 -1.171875 -1.953125 2.734375 2.734375 2.734375 -1.171875 2.734375 -1.171875 -1.171875 2.734375 -0.390625 -0.390625 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="81">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.23 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.459 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.689 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 318.021 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.317 0.295 0.264 0.223 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.223 0.244 0.264 0.285 0.306 0.326 0.347 0.354 0.54 0.702 0.858 1.02 1.195 1.387 1.599 1.836 2.104 2.407 2.756 3.159 3.631 4.191 4.868 5.707 6.778 8.218 10.278 11.4 11.363 10.984 10.313 9.476 8.568 7.655 6.778 5.962 5.218 4.55 3.957 3.434 2.976 2.576 2.228 1.926 1.664 1.437 1.24 1.071 0.924 0.798 0.688 0.594 0.512 0.442 0.381 0.329 0.284 0.245 0.211

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="11.4" PeakHeight="318.021" Num="5" zHalfNm="309.53" Error="7.277">
-66.167 -44.004 11.225 2.614 0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.689" Depth="0.154"/>
<TopsideChapman PeakHeight="318.021" PeakDensity="1612407.0" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
