<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 02:00:00.000"
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="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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Severe F-spread, F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.25 (298) 02:00:00</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">
FF202629810250200009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.791" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="45.308" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="270.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="250.301" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.835" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.439" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="23.143" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.927" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="11.602" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="24.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 230.000 230.000 230.000 230.000 225.000 226.667 228.333 230.000 230.000 230.000 231.176 232.353 233.529 234.706 235.882 237.059 238.235 239.412 240.588 241.765 242.941 244.118 245.294 246.471 247.647 248.824 250.000 260.000 260.000 260.000 256.000 252.000 248.000 244.000 240.000 237.500 235.000 235.000 235.000 235.000 235.714 236.429 237.143 237.857 238.571 239.286 240.000 240.000 235.000 235.000 235.426 235.851 236.277 236.702 237.128 237.553 237.979 238.404 238.830 239.255 239.681 240.106 240.532 240.957 241.383 241.809 242.234 242.660 243.085 243.511 243.936 244.362 244.787 245.213 245.638 246.064 246.489 246.915 247.340 247.766 248.191 248.617 249.043 249.468 249.894 250.319 250.745 251.170 251.596 252.021 252.447 252.872 253.298 253.723 254.149 254.574 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 257.000 259.000 261.000 263.000 265.000 265.000 265.000 263.750 262.500 261.250 260.000 260.000 260.000 260.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 265.000 265.000 270.000 275.000 275.000 270.000 270.000 270.000 270.000 270.000 270.000 273.333 276.667 280.000 285.000 290.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 0 72 0 60 0 66 0 63 0 72 0 0 66 0 0 0 0 0 0 0 0 0 0 69 0 0 69 66 0 0 0 0 75 0 72 0 0 66 66 66 0 72 0 0 69 63 72 69 72 0 0 0 0 72 0 0 0 0 0 0 0 0 0 69 69 69 0 0 69 63 0 0 0 0 72 69 0 0 0 0 0 0 0 0 63 0 0 0 0 0 0 0 0 0 0 66 63 0 0 69 0 72 0 0 60 0 0 0 0 0 60 0 0 0 0 0 69 0 0 60 63 0 0 66 0 0 0 0 60 0 0 0 0 0 0 0 0 0 57 0 60 0 57 0 0 0 63 60 54 0 57 0 0 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 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 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.953125 1.171875 1.953125 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.953125 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 -1.171875 -1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.171875 1.171875 1.953125 0.390625 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 1.171875 1.171875 1.953125 1.953125 1.171875 0.390625 1.953125 1.171875 1.953125 0.390625 1.953125 1.953125 1.171875 2.734375 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 2.734375 1.953125 1.171875 2.734375 1.171875 2.734375 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.171875 1.171875 1.171875 -2.734375 1.171875 -0.390625 1.953125 1.953125 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 2.734375 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 2.734375 1.953125 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="71">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.833 140.0 145.0 150.0 155.0 160.0 163.667 165.0 170.0 175.0 180.0 185.0 190.0 190.5 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 250.301 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.35 0.337 0.314 0.279 0.226 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.236 0.265 0.294 0.322 0.351 0.354 0.642 1.122 1.745 2.503 3.4 4.445 5.647 7.007 8.501 10.034 11.348 11.948 11.95 11.775 11.279 10.573 9.749 8.876 8.003 7.163 6.376 5.651 4.991 4.398 3.868 3.396 2.979 2.611 2.287 2.002 1.752 1.533 1.34 1.172 1.025 0.896 0.783 0.685 0.599 0.523 0.457 0.4 0.349 0.305 0.267 0.233 0.204

</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="11.95" PeakHeight="250.301" Num="5" zHalfNm="234.835" Error="0.891">
-56.157 -7.363 4.894 -1.226 0.051
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="80.5" Depth="0.154"/>
<TopsideChapman PeakHeight="250.301" PeakDensity="1771743.1" PeakScaleHeight="11.602" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
