<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 21:10:00.000"
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 8 0 0 0 0 0 0 0 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</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" >
2026.03.28 (087) 21:10:00</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">
FF202608703282110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="20" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.510" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.859" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.000" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="110.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="110.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="511.923" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.961" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.372" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.850" Description="Minimum frequency of Es-layer" Units="MHz" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 167.500 220.000 272.500 325.000 325.833 326.667 327.500 328.333 329.167 330.000 335.000 335.000 336.667 338.333 340.000 340.000 340.000 341.667 343.333 345.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 356.875 358.750 360.625 362.500 364.375 366.250 368.125 370.000 370.000 372.000 374.000 376.000 378.000 380.000 380.000 380.000 381.818 383.636 385.455 387.273 389.091 390.909 392.727 394.545 396.364 398.182 400.000 400.000 400.000 405.000 405.000 407.500 410.000 410.000 412.500 415.000 417.500 420.000 420.000 425.000 427.500 430.000 430.000 430.000 435.000 435.000 437.500 440.000 440.000 440.000 445.000 450.000 450.000 450.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 475.000 475.000 475.000 475.000 478.077 481.154 484.231 487.308 490.385 493.462 496.538 499.615 502.692 505.769 508.846 511.923 515.000 520.000 525.000 530.000 532.500 535.000 540.752 547.045 553.959 561.592 570.062 579.513
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 75 0 57 72 0 0 69 69 0 78 0 75 0 75 78 0 75 0 0 0 0 0 69 0 0 0 60 0 0 0 63 0 57 66 60 0 0 63 51 66 0 0 0 60 63 63 69 57 63 60 60 0 63 0 0 57 0 0 51 54 0 0 0 0 48 57 63 0 0 51 0 0 0 0 0 0 0 51 60 66 60 60 0 60 66 0 66 0 60 72 57 0 48 57 57 54 63 0 57 66 63 66 57 57 63 60 51 63 63 60 48 51 66 51 60 60 0 51 0 0 0 0 63 60 60 0 51 51 0 45 0 51 51 48 45 0 48 51 48 51 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="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 110.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 72 66 69
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
